Update README

.gitignore

@@ -1 +1,132 @@
-site/
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+pip-wheel-metadata/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+.python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# pyflow
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# Include frontend libraries though
+!/frontend/lib

README.md

@@ -1,23 +1,37 @@
-# TeraHz
-
 [![Documentation Status](https://readthedocs.org/projects/terahz/badge/?version=latest)](https://terahz.readthedocs.io/en/latest/?badge=latest)
+# <img alt="TeraHz logo" src="docs/imgs/logo-sq.png" width="200px"> TeraHz
+*This project is currently at a standstill because SparkFUN stopped making one of the board this project needs. TeraHz will return in a better form some day!*
+*Za slovensko različico se odpravite na <http://git.sckr-lab.tk/kristjank/TeraHz>*
 
-TeraHz is a low-cost spectrometer based on a Raspberry Pi 3 or 3 B+ and three sensors:
- + [__AS7265x__](https://www.tindie.com/products/onehorse/compact-as7265x-spectrometer/)
- is a 18 channel spectrometer chipset that provides the device with spectral data
- + [__VEML6075__](https://www.sparkfun.com/products/15089) is an
- UVA/UVB sensor
- + [__APDS-9301__](https://www.sparkfun.com/products/14350) is a calibrated illuminance (lux) meter that provides the device with reliable readings
+TeraHz is a low-cost portable spectrometer based on Raspberry Pi and a few
+commonly available sensor breakout boards. It's designed to bring low-cost
+scientific exploration of the light spectrum to educational institutions that
+cannot afford the options available on the current market. It costs less than
+200€ with money to spare and uses only free, libre and open-source software
+(FLOSS). It is free to use under the ISC license, a spiritual successor to the
+classic 3-clause BSD license.
 
-## Why?
-Because people and institutions could use an affordable and accurate light-analysing device that is also portable, easy to use and simple to assemble. TeraHz was started as an answer to our high school not being able to afford a commercially available solution. One TeraHz spectrometer costs around 150$ in parts, which makes it a competitive alternative to other solutions on the market today.
+## How to install
+Stable releases are available under the releases tab and can be installed either
+by flashing a **preinstalled** ready to boot image with a stable version of
+TeraHz preinstalled or by flashing a **preconfigured** image of DietPi and
+installing TeraHz manually, which is useful if you want to test bleeding edge
+releases. For more information, check out the [Build
+guide](https://terahz.readthedocs.io/en/latest/build/).
+
+## Docs
+TeraHz usually works out of the box. A wireless network named `TeraHz_XXXXXX`
+(XXXXXX = the last half of the MAC address) will appear. Password is
+`terahertz`. After connection, open a web browser and visit `terahz.site`.
+The UI will appear. To fetch data from the sensors, press the 'Get Data' button.
+The readings are then plotted and written into the tables below the graph.
+
+More documentation is available at <https://terahz.readthedocs.io>
 
 ## Development team
-Copyright 2018, 2019
+- Kristjan Komloši (cls-02) - Project leader and main programmer
+- Jakob Kosec (D3m1j4ck) - Frontend designer
+- Juš Dolžan (ANormalPerson) - Math double-checker
 
-- Kristjan "cls-02" Komloši (electronics, sensor drivers, backend)
-- Jakob "D3m1j4ck" Kosec (frontend)
-
-
-I would also like to thank Juš "ANormalPerson" Dolžan, who decided to leave the
-team, but helped me a lot with backend development.
+<img alt="TeraHz logo" src="http://www.sckr.si/documents/upload/konektor/logo/_SC.gif" width="200px">  
+TeraHz has been developed under guidance and financial support of Šolski Center Kranj (Kranj School Centre). Without their support, this project might have never been possible.

backend/app.py

@@ -1,17 +1,16 @@
 # app.py - main backend program
 '''Main TeraHz backend program'''
 # All code in this file is licensed under the ISC license, provided in LICENSE.txt
-from flask import Flask
-import flask
+from flask import Flask, jsonify
 import sensors
 
 app = Flask(__name__)
 @app.route('/data')
 def sendData():
     '''Responder function for /data route'''
-    s = sensors.Spectrometer(path='/dev/serial0', baudrate=115200, tout=1)
+    s = sensors.Spectrometer(path='/dev/serial0')
     u = sensors.UVSensor()
     l = sensors.LxMeter()
-    response = flask.jsonify([s.getData(), l.getData(), u.getABI()])
+    response = jsonify([s.getData(), l.getData(), u.getABI()])
     response.headers.add('Access-Control-Allow-Origin', '*')
     return response

backend/run.sh

@@ -1,4 +1,4 @@
 #!/bin/bash
 # run.sh - run the backend server
+cd `dirname $0`
 sudo gunicorn app:app -b 0.0.0.0:5000 &
-disown

backend/sensors.py

@@ -6,8 +6,13 @@ import serial as ser
 import pandas as pd
 import smbus2
 
+
+
+
+
 class Spectrometer:
     '''Class representing the AS7265X specrometer'''
+
     def initializeSensor(self):
         '''confirm the sensor is responding and proceed\
          with spectrometer initialization'''
@@ -23,8 +28,7 @@ class Spectrometer:
             if rstring == 'ERROR':
                 raise Exception  # sensor is in error state
         except:
-            raise Exception(
-                'An exception ocurred when performing spectrometer handshake')
+            raise Exception('No AT command response')
 
     def setParameters(self, parameters):
         '''applies the parameters like LED light and gain to the spectrometer'''
@@ -53,8 +57,7 @@ class Spectrometer:
                 self.serialObject.write('ATLED3={}\n'.format(led).encode())
                 self.serialObject.readline()
         except:
-            raise Exception(
-                'An exception occured during spectrometer initialization')
+            raise Exception('Error setting spectrometer parameters')
 
     def getData(self):
         '''Returns spectral data in a pandas DataFrame.'''
@@ -62,11 +65,10 @@ class Spectrometer:
             self.serialObject.write(b'ATCDATA\n')
             rawresp = self.serialObject.readline().decode()
         except:
-            raise Exception(
-                'An exception occurred when polling for spectrometer data')
+            raise Exception('Error polling spectrometer data')
         else:
-            responseorder = [i for i in 'RSTUVWGHIJKLABCDEF']
-            realorder = [i for i in 'ABCDEFGHRISJTUVWKL']
+            responseorder = list('RSTUVWGHIJKLABCDEF')
+            realorder = list('ABCDEFGHRISJTUVWKL')
             response = pd.Series(
                 [float(i) / 35.0 for i in rawresp[:-3].split(',')], index=responseorder)
             return pd.DataFrame(response, index=realorder, columns=['uW/cm^2']).to_dict()['uW/cm^2']
@@ -78,14 +80,14 @@ class Spectrometer:
         try:
             self.serialObject = ser.Serial(path, baudrate, timeout=tout)
         except:
-            raise Exception(
-                'An exception occured when opening the serial port at {}'.format(path))
+            raise Exception('Error opening serial port: {}'.format(path))
         else:
             self.initializeSensor()
 
 
 class LxMeter:
     '''Class representing the APDS-9301 digital photometer.'''
+
     def __init__(self, busNumber=1, addr=0x39):
         self.addr = addr
         try:
@@ -93,14 +95,14 @@ class LxMeter:
             self.bus = smbus2.SMBus(busNumber)
         except:
             raise Exception(
-                'An exception occured opening the SMBus {}'.format(self.bus))
+                'Error opening SMBus {}'.format(self.bus))
 
         try:
             self.bus.write_byte_data(
                 self.addr, 0xa0, 0x03)  # enable the sensor
             self.setGain(16)
         except:
-            raise Exception('An exception occured when enabling lux meter')
+            raise Exception('Error enabling lux meter')
 
     def setGain(self, gain):
         '''Set the sensor gain. Either 1 or 16.'''
@@ -109,15 +111,13 @@ class LxMeter:
                 temp = self.bus.read_byte_data(self.addr, 0xa1)
                 self.bus.write_byte_data(self.addr, 0xa1, 0xef & temp)
             except:
-                raise Exception(
-                    'An exception occured when setting lux meter gain')
+                raise Exception('Error setting lux meter gain')
         if gain == 16:
             try:
                 temp = self.bus.read_byte_data(self.addr, 0xa1)
                 self.bus.write_byte_data(self.addr, 0xa1, 0x10 | temp)
             except:
-                raise Exception(
-                    'An exception occured when setting lux meter gain')
+                raise Exception('Error setting lux meter gain')
         else:
             raise Exception('Invalid gain')
 
@@ -160,7 +160,7 @@ class LxMeter:
         except:
             raise Exception('An exception occured fetching lux channels')
 
-        # scary computations ahead! refer to the apds-9301 datasheet!
+        # Refer to APDS-9301 datasheet!
         if chB / chA <= 0.5 and chB / chA > 0:
             lux = 0.0304 * chA - 0.062 * chA * (chB / chA)**1.4
         elif chB / chA <= 0.61 and chB / chA > 0.5:
@@ -176,6 +176,7 @@ class LxMeter:
 
 class UVSensor:
     '''Class representing VEML6075 UVA/B meter'''
+
     def __init__(self, bus=1, addr=0x10):
         self.addr = addr
         try:
@@ -187,9 +188,16 @@ class UVSensor:
         try:
             # enable the sensor and set the integration time
             self.bus.write_byte_data(self.addr, 0x00, 0b00010000)
+
+            # trigger a measurement to prevent bus errors at first read
+            self.bus.write_byte_data(self.addr, 0x00, 0b00010010)  # UV_AF=1
+            self.bus.write_byte_data(self.addr, 0x00, 0b00010110)  # UV_TRIG=1
+            self.bus.write_byte_data(
+                self.addr, 0x00, 0b00010000)  # normal mode
+
         except:
             raise Exception(
-                'An exception occured when initalizing the UV Sensor')
+                'Error initalizing the UV Sensor')
 
     def getABI(self):
         '''Calculates the UVA and UVB irradiances,
@@ -202,40 +210,16 @@ class UVSensor:
             c1 = self.bus.read_word_data(self.addr, 0x0a)
             c2 = self.bus.read_word_data(self.addr, 0x0b)
         except:
-            raise Exception('An exception occured when fetching raw UV data')
-        # scary computations ahead! refer to Vishay app note 84339 and Sparkfun
-        # VEML6075 documentation.
-
-        # compensate for visible and IR noise
-        aCorr = aRaw - 2.22 * c1 - 1.33 * c2
-        bCorr = bRaw - 2.95 * c1 - 1.74 * c2
-
-        # convert values into irradiances
-        a = aCorr * 1.06
-        b = bCorr * 0.48
-
-        # zero out negative results (readings with no uv)
-        if a < 0:
-            a = 0
-        if b < 0:
-            b = 0
-        # last, calculate the UV index
-        i = (a + b) / 2
+            raise Exception('Error fetching raw UV data')
+        # Refer to Vishay app note 84339 and Sparkfun VEML6075 documentation.
+        # The computed values may be negative if UV is vastly weaker than
+        # visible and IR light. This is not a bug!
 
+        a = (aRaw - 2.22 * c1 - 1.33 * c2) * 1.06
+        b = (bRaw - 2.95 * c1 - 1.74 * c2) * 0.48
+        i = (a + b) / 2  # calculate UV index
         return [a, b, i]
 
-    def getA(self):
-        '''Returns UVA value. A getABI() wrapper.'''
-        return self.getABI()[0]
-
-    def getB(self):
-        '''Returns UVB value. A getABI() wrapper.'''
-        return self.getABI()[1]
-
-    def getI(self):
-        '''Returns UV index. A getABI() wrapper.'''
-        return self.getABI()[2]
-
     def on(self):
         '''Turns the UV sensor on after shutdown.'''
         try:
@@ -244,7 +228,7 @@ class UVSensor:
             self.bus.write_byte_data(self.addr, 0x00, 0x10)
         except:
             raise Exception(
-                'An exception occured when turning the UV sensor on')
+                'Error turning the UV sensor on')
 
     def off(self):
         '''Shuts the UV sensor down.'''
@@ -254,4 +238,4 @@ class UVSensor:
             self.bus.write_byte_data(self.addr, 0x00, 0x11)
         except:
             raise Exception(
-                'An exception occured when shutting the UV sensor down')
+                'Error shutting the UV sensor down')

backend/storage.py

@@ -1,37 +0,0 @@
-# storage.py - storage backend for TeraHz
-'''TeraHz storage backend'''
-# Copyright Kristjan Komloši 2019
-# All code in this file is licensed under the ISC license,
-# provided in LICENSE.txt
-
-
-import sqlite3
-class jsonStorage:
-    '''Class for simple sqlite3 database of JSON entries'''
-    def __init__(self, dbFile):
-        '''Storage object constructor. Argument is filename'''
-        self.db = sqlite3.connect(dbFile)
-
-    def listJSONs(self):
-        '''Returns a list of all existing entries.'''
-        c = self.db.cursor()
-        c.execute('SELECT * FROM storage')
-        result = c.fetchall()
-        c.close()
-        return result
-
-    def storeJSON(self, jsonString, comment):
-        '''Stores a JSON entry along with a timestamp and a comment.'''
-        c = self.db.cursor()
-        c.execute(('INSERT INTO storage VALUES (datetime'
-                   '(\'now\', \'localtime\'), ?, ?)'), (comment, jsonString))
-        c.close()
-        self.db.commit()
-
-    def retrieveJSON(self, timestamp):
-        '''Retrieves a JSON entry. Takes a timestamp string'''
-        c = self.db.cursor()
-        c.execute('SELECT * FROM storage WHERE timestamp = ?', (timestamp,))
-        result = c.fetchall()
-        c.close()
-        return result

backend/terahz.fcgi

@@ -1,7 +0,0 @@
-#!/usr/bin/python3
-# Minimal flup configuration for Flask
-from flup.server.fcgi import WSGIServer
-from app import app
-
-if __name__ == '__main__':
-    WSGIServer(app, bindAddress='/var/www/api/terahz.sock').run()

docs/build.md

@@ -1,169 +1,39 @@
 # TeraHz build guide
-This document describes the process of building/installing TeraHz from the Git
-repository.
+In its early development phase, TeraHz was hard and time-consuming to compile and install.
+This is not case now, as the more optimized DietPi Linux distribution allows
+better performance and simpler configuration than formerly used Raspbian.
 
-## Warning
-The recommended way of getting TeraHz is the official Raspberry Pi SD card image
-provided under the releases tab in the GitHub repository. Installing TeraHz from
-source is a time consuming and painful process, even more so if you don't know
-what you're doing, and whatever you end up building __will not be officially
-supported__ (unless you're a core developer).
+## Downloading the complete image
+The easiest way to get TeraHz is to download the premade complete image and
+write it to an SD card. It already has TeraHz installed and **will work out of
+the box** with the correct hardware. The image is designed to run from a 16 GB
+micro SD card, class 10 or higher is recommended for snappy performance. The
+recommended image writer is Etcher
 
-With this warning out of the way, let's begin.
+Please note that while this installation process is the easiest to perform, it
+does not guarantee the most recent TeraHz software. Complete images take time to
+prepare and despite the developer's best efforts aren't guaranteed to be always
+up-to-date.
 
-## Getting the latest sources
-The most reliable way to get working source code is by cloning the official
-GitHub repository and checking out the `development-stable` tag. This tag marks
-the latest confirmed working commit. Building from the master branch is somewhat
-risky, and building from development branches is straight up stupid if you're
-not a developer.
+## Downloading the clean DietPi image and installing TeraHz manually
+This process is a bit more involved, but the version of TeraHz installed is
+guaranteed to be the latest one available from the repository.
 
-Make sure that the repository is cloned into `/home/pi/TeraHz`, as Lighttpd
-expects to find frontend files inside this directory.
+The SD card image used in this case also contains some pre-configuration, but no
+TeraHz code is installed. To install TeraHz, you'll need a console access to the
+Raspberry Pi, preferably an SSH console over a wired network. DietPi is configured
+to get an IP over DHCP. A tool such as arp-scan on linux is very helpful at determining
+the device's IP address.
 
-After cloning and checking out, check the documentation for module dependencies
-and the required version of python in the `docs/dependencies.md` file.
-
-## Installing Python
-This step depends a lot on the platform you're using. TeraHz was developed with
-Raspberry Pi and Raspbian in mind. If you're familiar with Raspbian enough,
-you'll know that the latest version of Python available is `3.5`, which is too
-obsolete to run TeraHz and the required modules consistently. This leaves us
-with compiling Python from source. __This step is guaranteed to be slow,
-overnight compiling with something like tmux is recommended.__
-
-### Pre-requirements
-Installing python without most C libraries will lead to a rather minimalistic
-Python install, missing a lot of important modules. To prevent this, update
-the system packages. After that, reboot.
+After connecting to the Raspberry Pi with username `root` and password `terahz`,
+TeraHz can be installed by cloning the Git repository and running the `etcs/install.sh`
+script.
 
 ```
-sudo apt update
-sudo apt full-upgrade
-sudo reboot
+git clone https://github.com/cls-02/TeraHz.git
+cd TeraHz/etcs
+./install.sh
 ```
 
-Install the required build tools, libraries and their headers.
-
-```
-sudo apt-get install build-essential tk-dev libncurses5-dev libncursesw5-dev \
-libreadline6-dev libdb5.3-dev libgdbm-dev libsqlite3-dev libssl-dev libbz2-dev \
-libexpat1-dev liblzma-dev zlib1g-dev
-```
-
-### Compiling
-Compiling Python from source is, in fact pretty easy, just time-consuming. To combat
-that, using tmux to detach and later reattach the session is advised.
-
-Python is packaged in many forms, but you'll be using the most basic
-of them all: a gzipped tarball. Download and decompress it, then cd into its
-directory.
-
-```
-wget https://www.python.org/ftp/python/3.6.8/Python-3.6.8.tgz
-tar -xzf Python-3.6.8.tgz
-cd Python-3.6.8
-```
-
-Python's build process is pretty classic, a `.configure` script and a Makefile.
-Using the `-j` option with Make can reduce the compile time significantly. Go
-with as many threads as you have cores: `-j 4` works great on the Pi 3 B/B+.
-
-```
-./configure
-make -j4
-```
-
-When the compilation ends, install your freshly built version of python.
-
-```
-sudo make altinstall
-```
-
-"Altinstall" means that the new version of Python will be installed beside the
-existing version, and all related commands will use the full naming scheme:
-think `python3.6` or `pip3.6` instead of the shorter `python3` or `pip3`.
-
-### Modules
-Another painfully slow part is the installation of all the required modules
-needed by TeraHz. Luckily, `pip3.6` takes care of the entire installation
-process. As before, using tmux is advised.
-
-```
-pip3.6 install smbus pyserial flask pandas
-```
-
-## Raspi-config
-For some law-obeying reason, Raspbian locks down the Wi-Fi interface card until
-the Wi-Fi country is set. This means that we will need to set it manually through
-the `raspi-config` program. It requires superuser privileges.
-
-```
-sudo raspi-config
-```
-![1](imgs/raspi-config/1.png)
-
-Configure the network hostname to something specific. If setting up multiple
-TeraHz machines, make their hostnames unique so you can tell them apart.
-
-![](imgs/raspi-config/3.png)
-![](imgs/raspi-config/4.png)
-
-Enable SSH and I2C interfaces.
-![](imgs/raspi-config/15.png)
-![](imgs/raspi-config/5.png)
-![](imgs/raspi-config/6.png)
-![](imgs/raspi-config/7.png)
-![](imgs/raspi-config/19.png)
-
-Expand the root filesystem along the entire SD card.
-
-![](imgs/raspi-config/17.png)
-![](imgs/raspi-config/8.png)
-![](imgs/raspi-config/9.png)
-
-Set the Wi-Fi country to the country you'll be using TeraHz in.
-
-![](imgs/raspi-config/10.png)
-![](imgs/raspi-config/11.png)
-![](imgs/raspi-config/12.png)
-![](imgs/raspi-config/13.png)
-![](imgs/raspi-config/14.png)
-
-Save and reboot to enable Wi-Fi
-
-## Installing packages
-In addition to what's already installed, TeraHz requires the following daemons
-to run:
-  - Lighttpd - Frontend HTTP server
-  - Dnsmasq - DNS and DHCP server, used to redirect the `terahz.site` domain
-  - Hostapd - Wi-Fi access point
-
-They are available from the Raspbian repository. Install it via `apt`.
-
-```
-apt install hostapd dnsmasq hostapd
-```
-
-## Configuring daemons
-By default, the daemons we installed are disabled and start only manually. To
-change that, enable them through systemctl. Hostapd conflicts with
-wpa_supplicant, the solution is to disable wpa_supplicant (this will break your
-wireless connections, so use wired ethernet).
-
-```
-sudo systemctl unmask hostapd
-sudo systemctl stop wpa_supplicant
-sudo systemctl disable wpa_supplicant
-sudo systemctl enable dnsmasq hostapd lighttpd
-```
-
-## Copying configuration files
-To simplify the process of configuring Raspbian to run TeraHz, sample
-configuration file are provided in the `etcs` subdirectory of the Git
-repository.
-
-These files have been verified to work, but it's not a brilliant idea to just
-copy them into your `/etc` directory. Use them carefully and more as a template
-for your own configuration rather than as a _de facto_ way of configuring
-TeraHz.
+When the installation completes, reboot the Raspberry Pi and it will
+automatically boot into TeraHz.

docs/dependencies.md

@@ -1,26 +1,24 @@
-# Development-stable dependencies
-The current development version of TeraHz has been verified to work with:
-
-  - Raspbian Stretch (9)
-  - Python 3.6.8 (built from source code and altinstall'd)
-  - Module versions (direct `pip3.6 list` output):
-
+# 1.0.0-rc1 Dependencies
+The 1.0.0-rc1 version of TeraHz is confirmed to work with:
+- DietPi 6.26.3
+- Python 3.7.3
+- Pip 18.1
+- Following versions of pip3 packages:
 ```
-      Package         Version  
-      --------------- ---------
 Click           7.0    
-      Flask           1.0.3    
+Flask           1.1.1  
+gunicorn        20.0.0
 itsdangerous    1.1.0  
-      Jinja2          2.10.1   
+Jinja2          2.10.3
 MarkupSafe      1.1.1  
-      numpy           1.16.4   
-      pandas          0.24.2   
+numpy           1.17.4
+pandas          0.25.3
 pip             18.1   
 pyserial        3.4    
-      python-dateutil 2.8.0    
-      pytz            2019.1   
-      setuptools      40.6.2   
-      six             1.12.0   
-      smbus           1.1.post2
-      Werkzeug        0.15.4   
+python-dateutil 2.8.1  
+pytz            2019.3
+setuptools      41.6.0
+six             1.13.0
+smbus2          0.3.0  
+Werkzeug        0.16.0
 ```

docs/dev-guide.md

@@ -7,17 +7,12 @@ TeraHz was developed on and for the Raspberry Pi 3 Model B+. Compatibility with
 other Raspberries can probably be achieved by tweaking the device paths in the
 `app.py` file, but isn't confirmed at this point. Theoretically, 3 Model B and
 Zero W should work out of the box, but models without Wi-Fi will need an
-external Wi-Fi adapter if Wi-Fi functionality is desired. The practicality of
-compiling Python on the first generation of Raspberry Pis is also very
-questionable.
+external Wi-Fi adapter if Wi-Fi functionality is desired.
 
-Sensors required for operation are:
-+ AS7265x
-+ VEML6075
-+ APDS-9301
-
-They provide the spectrometry data, UV data and illuminance data, respectively.
-They all support I2C, AS7265x supports UART in addition.
+TeraHz depends on three separate sensor boards:
+- AS7265x spectral chipset
+- VEML6075 UV sensor
+- APDS-9301 lux-meter
 
 The sensors leech power from the GPIO connector, thus eliminating the need for a
 separate power supply. The necessary power for the whole system is delivered through

docs/electrical.md

@@ -21,13 +21,9 @@ project when basic testing will be done.
 
 GPIO can be routed to the PCB with a standard old IDE disk cable, and terminated
 with another 40-pin connector at the PCB. Sensor breakouts should be mounted
-<<<<<<< HEAD
 through standard 0.1" connectors, male on the sensor breakout and female on the
 PCB. A shitty add-on header and a shitty add-on header v1.69bis can't hurt, either.
-=======
-through standard 0.1" connectors, male on the sensor brakout and female on the
-PCB. A shitty addon header and a shitty addon header v1.69bis can't hurt, either.
->>>>>>> fd1f07d40dace3e003e49377d4771de53f8bdeb8
+
 
 ## SMBus sensors
 SMBus is a well-defined version of the well-known I2C bus, widely used
@@ -39,11 +35,8 @@ Pins are familiarly marked as SDA and SCL, the same as with classic I2C. They
 connect to the SDA and SCL pins on the VEML6075 and APDS-9301 sensor.
 
 ## UART sensor
-<<<<<<< HEAD
 Spectral sensor attaches through the UART port on the Raspberry pi (see picture).
-=======
-Spectrometry sensor attaches through the UART port on the Raspberry pi (see picture).
->>>>>>> fd1f07d40dace3e003e49377d4771de53f8bdeb8
+
 
 The Tx and Rx lines must cross over, connecting the sensor's Tx line to the
 computer's Rx line and vice versa.

etcs/hostapd/edit_ssid.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 # edit_ssid.sh - edits hostapd.conf and sets a MAC address-based SSID
+cd `dirname $0`
 ssid=`ip link | awk '/wlan0/ {getline; print $2}' | awk -v FS=':' '{printf("TeraHz_%s%s%s\n", $4, $5, $6)}'`
 sed "/ssid=.*/s/ssid=.*/ssid=$ssid/" hostapd.conf > newconf
 mv newconf hostapd.conf

etcs/install.sh

@@ -1,19 +1,23 @@
-# install.sh - install TeraHz onto a Raspbian or DietPi installation
+# install.sh - install TeraHz onto a Raspbian Lite instance
+cd `dirname $0`
+
 apt -y update
 apt -y full-upgrade
 apt install -y python3 python3-pip lighttpd dnsmasq hostapd libatlas-base-dev
-pip3 install numpy pandas flask smbus2 pyserial
+pip3 install numpy pandas flask smbus2 pyserial gunicorn
+
+cp -R hostapd/* /etc/hostapd/
+chmod +rx /etc/hostapd/edit_ssid.sh
+cp dnsmasq.conf /etc/
+
+cp rc.local /etc/
+chmod +rx /etc/rc.local
+cp interfaces-terahz /etc/network/interfaces.d/
+
+cp -R ../frontend/* /var/www/html/
 
-cp -R hostapd/ /etc
-cp -R lighttpd/ /etc
-cp dnsmasq.conf /etc
-cp rc.local /etc
-cp -R ../frontend/* /var/www/html
 mkdir -p /usr/local/lib/terahz
 cp -R ../backend/* /usr/local/lib/terahz
-cd /etc/hostapd
-chmod +x edit_ssid.sh
-./edit_ssid.sh
 
 systemctl unmask dnsmasq hostapd lighttpd
 systemctl enable dnsmasq hostapd lighttpd

etcs/interfaces-terahz

@@ -0,0 +1,3 @@
+iface wlan0 inet static
+  address 192.168.1.1
+  netmask 255.255.255.0

etcs/lighttpd/lighttpd.conf

@@ -1,27 +0,0 @@
-server.modules = (
-	"mod_access",
-	"mod_alias",
-	"mod_compress",
- 	"mod_redirect"
-)
-
-server.document-root        = "/var/www/html"
-server.upload-dirs          = ( "/var/cache/lighttpd/uploads" )
-server.errorlog             = "/var/log/lighttpd/error.log"
-server.pid-file             = "/var/run/lighttpd.pid"
-server.username             = "www-data"
-server.groupname            = "www-data"
-server.port                 = 80
-
-
-index-file.names            = ( "index.php", "index.html", "index.lighttpd.html" )
-url.access-deny             = ( "~", ".inc" )
-static-file.exclude-extensions = ( ".php", ".pl", ".fcgi" )
-
-compress.cache-dir          = "/var/cache/lighttpd/compress/"
-compress.filetype           = ( "application/javascript", "text/css", "text/html", "text/plain" )
-
-# default listening port for IPv6 falls back to the IPv4 port
-include_shell "/usr/share/lighttpd/use-ipv6.pl " + server.port
-include_shell "/usr/share/lighttpd/create-mime.assign.pl"
-include_shell "/usr/share/lighttpd/include-conf-enabled.pl"

etcs/rc.local

@@ -10,5 +10,7 @@
 # bits.
 #
 # By default this script does nothing.
+/etc/hostapd/edit_ssid.sh &
 /usr/local/lib/terahz/run.sh &
-disown
+sleep 3
+service hostapd restart # restart hostapd to prevent a weird startup race condition

frontend/frontend.js

@@ -1,7 +1,5 @@
 // All code in this file is licensed under the ISC license, provided in LICENSE.txt
-$('#update').click(function () {
-  updateData();
-});
+$('#update').click(updateData);
 // jQuery event binder
 
 function updateData () {
@@ -22,11 +20,11 @@ function graphSpectralData (obj, dom) {
   var graphPoints = [];
   var graphXTicks = [];
 
-  Object.keys(obj).forEach((element, index) => {
-    graphPoints.push([index, obj[element]]); // build array of points
-    graphXTicks.push([index, element]); // build array of axis labels
-  });
-  // console.log(graphPoints);
+  const specter = 'ABCDEFGHRISJTUVWKL';
+  for (var i = 0; i < specter.length; i++) {
+    graphPoints.push([i, obj[specter[i]]]);
+    graphXTicks.push([i, specter[i]]);
+  }
   const options = {
     grid: { color: 'white' },
     xaxis: { ticks: graphXTicks }

frontend/index.html

@@ -6,20 +6,39 @@
   <link rel="stylesheet" href="lib/bootstrap.min.css">
   <link rel="stylesheet" href="stylesheet.css">
   <title>TeraHz</title>
+  <script src="lib/bootstrap.bundle.min.js"></script>
+  <script src="lib/jquery-3.4.1.min.js"></script>
+  <script src="lib/flot/jquery.flot.js"></script>
+  <script src="frontend.js"></script>
+  <script src="lib/flot/jquery.canvaswrapper.js"></script>
+  <script src="lib/flot/jquery.colorhelpers.js"></script>
+  <script src="lib/flot/jquery.flot.js"></script>
+  <script src="lib/flot/jquery.flot.saturated.js"></script>
+  <script src="lib/flot/jquery.flot.browser.js"></script>
+  <script src="lib/flot/jquery.flot.drawSeries.js"></script>
+  <script src="lib/flot/jquery.flot.uiConstants.js"></script>
 </head>
 
 <body>
   <div class="container text-center">
     <h1><img src="lib/logo-sq.png" height="64px">TeraHz</h1>
-
   </div>
+
   <div class="container">
-    <button id="update" class="btn btn-primary m-1 float-right">Get data</button>
-    <p id="debug">
-    </p>
-    <h3>Spectrogram</h3>
+    <button id="update" onclick="updateData()" class="btn btn-primary">Get data</button>
+    <!-- <button id="download" class="btn btn-primary">Download</button>
+    <button id="debug" class="btn btn-danger">DEBUG</button> -->
+  </div>
+
+  <div class="container">
+    <div class="row">
+    <div class="col-sm">
+      <h4>Spectrogram</h4>
       <div id="graph" style="height:480px;width:720px"></div>
-    <h3>Spectral readings</h3>
+    </div>
+
+    <div class="col-sm">
+      <h4>Visible+IR spectrum</h4>
       <table class="table table-dark table-sm" id="specter">
         <thead class="thead-dark">
           <tr>
@@ -119,9 +138,11 @@
           <td id="L">---</td>
         </tr>
       </table>
-    <br>
-    <h3>Lux and UV readings</h3>
-    <table class="table-dark table" id="luxuv">
+    </div>
+
+    <div class="col-sm">
+      <h4>UV+Illuminance</h4>
+      <table class="table-dark table table-sm" id="luxuv">
         <thead class="thead-dark">
           <tr>
             <th>Parameter</th>
@@ -146,17 +167,7 @@
         </tr>
       </table>
     </div>
-  <script src="lib/bootstrap.bundle.min.js"></script>
-  <script src="lib/jquery-3.4.1.min.js"></script>
-  <script src="lib/flot/jquery.flot.js"></script>
-  <script src="frontend.js"></script>
-  <script src="lib/flot/jquery.canvaswrapper.js"></script>
-  <script src="lib/flot/jquery.colorhelpers.js"></script>
-  <script src="lib/flot/jquery.flot.js"></script>
-  <script src="lib/flot/jquery.flot.saturated.js"></script>
-  <script src="lib/flot/jquery.flot.browser.js"></script>
-  <script src="lib/flot/jquery.flot.drawSeries.js"></script>
-  <script src="lib/flot/jquery.flot.uiConstants.js"></script>
+    </div>
+  </div>
 </body>
-
 </html>

mkdocs.yml

@@ -5,5 +5,5 @@ nav:
 - Advanced guides:
   - Build guide: 'build.md'
   - Developer's guide: 'dev-guide.md'
-  - Electrical connections: 'electrical.md'
+  - Electrical guide: 'electrical.md'
   - Latest dependencies: 'dependencies.md'

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sensor_docs/sysprep.md

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-# sysprep - How to prepare a Raspberry Pi 3 B+ to run TeraHz

utils/getcdata.py

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-# getcdata.py - fetch the calibrated data from the AS7265x module
-# All code in this file is licensed under the ISC license, provided in LICENSE.txt
-
-import serial as ser
-import pandas as pd
-import numpy as np
-import matplotlib.pyplot as plt
-import time
-#global variables
-uartpath = '/dev/ttyUSB0'
-uartbaud = 115200
-uarttout = 5
-
-wl = [410, 435, 460, 485, 510, 535, 560, 585, 610, 645, 680, 705, 730, 760, 810, 860, 900, 940]
-responseorder = [i for i in 'RSTUVWGHIJKLABCDEF'] # works, do NOT touch!
-realorder = [i for i in 'ABCDEFGHRISJTUVWKL']
-
-
-print('getcdata')
-print('This utility is part of the TeraHz project')
-
-wavelens = pd.Series(realorder)
-
-
-plt.ion()
-win = plt.figure()
-spectrum=win.add_subplot(111)
-
-
-with ser.Serial(uartpath, uartbaud, timeout=uarttout) as sensor:
-    while True:
-        sensor.write(b'ATCDATA\n')
-        rawresp = sensor.readline().decode()
-        # parses, calculates and saves the data
-        response = pd.Series([float(i)/35.0 for i in rawresp[:-3].split(',')], index=responseorder)
-        data = pd.DataFrame(response, index=realorder, columns = ['uW/cm^2']) # puts data into a DataFrame
-        data.insert(0, 'wavelenght', wl) #inserts a legend
-        print(data)
-        spectrum.cla()
-        spectrum.plot(data['wavelenght'], data['uW/cm^2'])
-        spectrum.set_xlabel('Valovna dolžina')
-        spectrum.set_ylabel('uW/cm2')
-        win.canvas.draw()
-
-        time.sleep(0.1)

utils/smbus-test.py

@@ -1,12 +0,0 @@
-import smbus2
-
-bus = smbus2.SMBus(1)
-
-result = bus.read_byte_data(0x39, 0x8a)
-print('LUX Meter ID = {}'.format(result))
-
-result = bus.read_word_data(0x10, 0x0c)
-print('UV sensor ID = {}'.format(result))
-
-result = bus.read_word_data(0x39, 0xec)
-print('LUX chan 0 = {}'.format(result))

utils/tinter-demo.py

@@ -1,22 +0,0 @@
-from serial import Serial
-import tkinter as tk
-import pandas as pd
-
-from matplotlib.backends.backend_tkagg import (FigureCanvasTkAgg, NavigationToolbar2Tk)
-from matplotlib.backend_bases import key_press_handler
-from matplotlib.figure import Figure
-
-uartpath = '/dev/ttyUSB0'
-uartbaud = 115200
-uarttout = 5
-
-wl = [410, 435, 460, 485, 510, 535, 560, 585, 610, 645, 680, 705, 730, 760, 810, 860, 900, 940]
-responseorder = [i for i in 'RSTUVWGHIJKLABCDEF'] # works, do NOT touch!
-realorder = [i for i in 'ABCDEFGHRISJTUVWKL']
-
-root = tk.Tk()
-root.wm_title('TeraHz Demo')
-
-fig = Figure(figsize=(5, 4), dpi=100)
-plot = fig.add_subplot(111)
-canvas = FigureCanvasTkAgg(fig, master=root)

utils/venv/bin/activate

@@ -1,76 +0,0 @@
-# This file must be used with "source bin/activate" *from bash*
-# you cannot run it directly
-
-deactivate () {
-    # reset old environment variables
-    if [ -n "${_OLD_VIRTUAL_PATH:-}" ] ; then
-        PATH="${_OLD_VIRTUAL_PATH:-}"
-        export PATH
-        unset _OLD_VIRTUAL_PATH
-    fi
-    if [ -n "${_OLD_VIRTUAL_PYTHONHOME:-}" ] ; then
-        PYTHONHOME="${_OLD_VIRTUAL_PYTHONHOME:-}"
-        export PYTHONHOME
-        unset _OLD_VIRTUAL_PYTHONHOME
-    fi
-
-    # This should detect bash and zsh, which have a hash command that must
-    # be called to get it to forget past commands.  Without forgetting
-    # past commands the $PATH changes we made may not be respected
-    if [ -n "${BASH:-}" -o -n "${ZSH_VERSION:-}" ] ; then
-        hash -r
-    fi
-
-    if [ -n "${_OLD_VIRTUAL_PS1:-}" ] ; then
-        PS1="${_OLD_VIRTUAL_PS1:-}"
-        export PS1
-        unset _OLD_VIRTUAL_PS1
-    fi
-
-    unset VIRTUAL_ENV
-    if [ ! "$1" = "nondestructive" ] ; then
-    # Self destruct!
-        unset -f deactivate
-    fi
-}
-
-# unset irrelevant variables
-deactivate nondestructive
-
-VIRTUAL_ENV="/root/projekti/TeraHz/utils/venv"
-export VIRTUAL_ENV
-
-_OLD_VIRTUAL_PATH="$PATH"
-PATH="$VIRTUAL_ENV/bin:$PATH"
-export PATH
-
-# unset PYTHONHOME if set
-# this will fail if PYTHONHOME is set to the empty string (which is bad anyway)
-# could use `if (set -u; : $PYTHONHOME) ;` in bash
-if [ -n "${PYTHONHOME:-}" ] ; then
-    _OLD_VIRTUAL_PYTHONHOME="${PYTHONHOME:-}"
-    unset PYTHONHOME
-fi
-
-if [ -z "${VIRTUAL_ENV_DISABLE_PROMPT:-}" ] ; then
-    _OLD_VIRTUAL_PS1="${PS1:-}"
-    if [ "x(venv) " != x ] ; then
-	PS1="(venv) ${PS1:-}"
-    else
-    if [ "`basename \"$VIRTUAL_ENV\"`" = "__" ] ; then
-        # special case for Aspen magic directories
-        # see http://www.zetadev.com/software/aspen/
-        PS1="[`basename \`dirname \"$VIRTUAL_ENV\"\``] $PS1"
-    else
-        PS1="(`basename \"$VIRTUAL_ENV\"`)$PS1"
-    fi
-    fi
-    export PS1
-fi
-
-# This should detect bash and zsh, which have a hash command that must
-# be called to get it to forget past commands.  Without forgetting
-# past commands the $PATH changes we made may not be respected
-if [ -n "${BASH:-}" -o -n "${ZSH_VERSION:-}" ] ; then
-    hash -r
-fi

utils/venv/bin/activate.csh

@@ -1,37 +0,0 @@
-# This file must be used with "source bin/activate.csh" *from csh*.
-# You cannot run it directly.
-# Created by Davide Di Blasi <davidedb@gmail.com>.
-# Ported to Python 3.3 venv by Andrew Svetlov <andrew.svetlov@gmail.com>
-
-alias deactivate 'test $?_OLD_VIRTUAL_PATH != 0 && setenv PATH "$_OLD_VIRTUAL_PATH" && unset _OLD_VIRTUAL_PATH; rehash; test $?_OLD_VIRTUAL_PROMPT != 0 && set prompt="$_OLD_VIRTUAL_PROMPT" && unset _OLD_VIRTUAL_PROMPT; unsetenv VIRTUAL_ENV; test "\!:*" != "nondestructive" && unalias deactivate'
-
-# Unset irrelevant variables.
-deactivate nondestructive
-
-setenv VIRTUAL_ENV "/root/projekti/TeraHz/utils/venv"
-
-set _OLD_VIRTUAL_PATH="$PATH"
-setenv PATH "$VIRTUAL_ENV/bin:$PATH"
-
-
-set _OLD_VIRTUAL_PROMPT="$prompt"
-
-if (! "$?VIRTUAL_ENV_DISABLE_PROMPT") then
-    if ("venv" != "") then
-        set env_name = "venv"
-    else
-        if (`basename "VIRTUAL_ENV"` == "__") then
-            # special case for Aspen magic directories
-            # see http://www.zetadev.com/software/aspen/
-            set env_name = `basename \`dirname "$VIRTUAL_ENV"\``
-        else
-            set env_name = `basename "$VIRTUAL_ENV"`
-        endif
-    endif
-    set prompt = "[$env_name] $prompt"
-    unset env_name
-endif
-
-alias pydoc python -m pydoc
-
-rehash

utils/venv/bin/activate.fish

@@ -1,75 +0,0 @@
-# This file must be used with ". bin/activate.fish" *from fish* (http://fishshell.org)
-# you cannot run it directly
-
-function deactivate  -d "Exit virtualenv and return to normal shell environment"
-    # reset old environment variables
-    if test -n "$_OLD_VIRTUAL_PATH"
-        set -gx PATH $_OLD_VIRTUAL_PATH
-        set -e _OLD_VIRTUAL_PATH
-    end
-    if test -n "$_OLD_VIRTUAL_PYTHONHOME"
-        set -gx PYTHONHOME $_OLD_VIRTUAL_PYTHONHOME
-        set -e _OLD_VIRTUAL_PYTHONHOME
-    end
-
-    if test -n "$_OLD_FISH_PROMPT_OVERRIDE"
-        functions -e fish_prompt
-        set -e _OLD_FISH_PROMPT_OVERRIDE
-        functions -c _old_fish_prompt fish_prompt
-        functions -e _old_fish_prompt
-    end
-
-    set -e VIRTUAL_ENV
-    if test "$argv[1]" != "nondestructive"
-        # Self destruct!
-        functions -e deactivate
-    end
-end
-
-# unset irrelevant variables
-deactivate nondestructive
-
-set -gx VIRTUAL_ENV "/root/projekti/TeraHz/utils/venv"
-
-set -gx _OLD_VIRTUAL_PATH $PATH
-set -gx PATH "$VIRTUAL_ENV/bin" $PATH
-
-# unset PYTHONHOME if set
-if set -q PYTHONHOME
-    set -gx _OLD_VIRTUAL_PYTHONHOME $PYTHONHOME
-    set -e PYTHONHOME
-end
-
-if test -z "$VIRTUAL_ENV_DISABLE_PROMPT"
-    # fish uses a function instead of an env var to generate the prompt.
-
-    # save the current fish_prompt function as the function _old_fish_prompt
-    functions -c fish_prompt _old_fish_prompt
-
-    # with the original prompt function renamed, we can override with our own.
-    function fish_prompt
-        # Save the return status of the last command
-        set -l old_status $status
-
-        # Prompt override?
-        if test -n "(venv) "            
-            printf "%s%s" "(venv) " (set_color normal)
-        else
-            # ...Otherwise, prepend env
-            set -l _checkbase (basename "$VIRTUAL_ENV")
-            if test $_checkbase = "__"
-                # special case for Aspen magic directories
-                # see http://www.zetadev.com/software/aspen/
-                printf "%s[%s]%s " (set_color -b blue white) (basename (dirname "$VIRTUAL_ENV")) (set_color normal)
-            else
-                printf "%s(%s)%s" (set_color -b blue white) (basename "$VIRTUAL_ENV") (set_color normal)
-            end
-        end
-
-        # Restore the return status of the previous command.
-        echo "exit $old_status" | .
-        _old_fish_prompt
-    end
-
-    set -gx _OLD_FISH_PROMPT_OVERRIDE "$VIRTUAL_ENV"
-end

utils/venv/bin/easy_install

@@ -1,10 +0,0 @@
-#!/root/projekti/TeraHz/utils/venv/bin/python3
-# -*- coding: utf-8 -*-
-import re
-import sys
-
-from setuptools.command.easy_install import main
-
-if __name__ == '__main__':
-    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
-    sys.exit(main())

utils/venv/bin/easy_install-3.6

@@ -1,10 +0,0 @@
-#!/root/projekti/TeraHz/utils/venv/bin/python3
-# -*- coding: utf-8 -*-
-import re
-import sys
-
-from setuptools.command.easy_install import main
-
-if __name__ == '__main__':
-    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
-    sys.exit(main())

utils/venv/bin/f2py

@@ -1,10 +0,0 @@
-#!/root/projekti/TeraHz/utils/venv/bin/python3
-# -*- coding: utf-8 -*-
-import re
-import sys
-
-from numpy.f2py.f2py2e import main
-
-if __name__ == '__main__':
-    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
-    sys.exit(main())

utils/venv/bin/f2py3

@@ -1,10 +0,0 @@
-#!/root/projekti/TeraHz/utils/venv/bin/python3
-# -*- coding: utf-8 -*-
-import re
-import sys
-
-from numpy.f2py.f2py2e import main
-
-if __name__ == '__main__':
-    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
-    sys.exit(main())

utils/venv/bin/f2py3.6

@@ -1,10 +0,0 @@
-#!/root/projekti/TeraHz/utils/venv/bin/python3
-# -*- coding: utf-8 -*-
-import re
-import sys
-
-from numpy.f2py.f2py2e import main
-
-if __name__ == '__main__':
-    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
-    sys.exit(main())

utils/venv/bin/miniterm.py

@@ -1,976 +0,0 @@
-#!/root/projekti/TeraHz/utils/venv/bin/python3
-#
-# Very simple serial terminal
-#
-# This file is part of pySerial. https://github.com/pyserial/pyserial
-# (C)2002-2015 Chris Liechti <cliechti@gmx.net>
-#
-# SPDX-License-Identifier:    BSD-3-Clause
-
-import codecs
-import os
-import sys
-import threading
-
-import serial
-from serial.tools.list_ports import comports
-from serial.tools import hexlify_codec
-
-# pylint: disable=wrong-import-order,wrong-import-position
-
-codecs.register(lambda c: hexlify_codec.getregentry() if c == 'hexlify' else None)
-
-try:
-    raw_input
-except NameError:
-    # pylint: disable=redefined-builtin,invalid-name
-    raw_input = input   # in python3 it's "raw"
-    unichr = chr
-
-
-def key_description(character):
-    """generate a readable description for a key"""
-    ascii_code = ord(character)
-    if ascii_code < 32:
-        return 'Ctrl+{:c}'.format(ord('@') + ascii_code)
-    else:
-        return repr(character)
-
-
-# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-class ConsoleBase(object):
-    """OS abstraction for console (input/output codec, no echo)"""
-
-    def __init__(self):
-        if sys.version_info >= (3, 0):
-            self.byte_output = sys.stdout.buffer
-        else:
-            self.byte_output = sys.stdout
-        self.output = sys.stdout
-
-    def setup(self):
-        """Set console to read single characters, no echo"""
-
-    def cleanup(self):
-        """Restore default console settings"""
-
-    def getkey(self):
-        """Read a single key from the console"""
-        return None
-
-    def write_bytes(self, byte_string):
-        """Write bytes (already encoded)"""
-        self.byte_output.write(byte_string)
-        self.byte_output.flush()
-
-    def write(self, text):
-        """Write string"""
-        self.output.write(text)
-        self.output.flush()
-
-    def cancel(self):
-        """Cancel getkey operation"""
-
-    #  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -
-    # context manager:
-    # switch terminal temporary to normal mode (e.g. to get user input)
-
-    def __enter__(self):
-        self.cleanup()
-        return self
-
-    def __exit__(self, *args, **kwargs):
-        self.setup()
-
-
-if os.name == 'nt':  # noqa
-    import msvcrt
-    import ctypes
-
-    class Out(object):
-        """file-like wrapper that uses os.write"""
-
-        def __init__(self, fd):
-            self.fd = fd
-
-        def flush(self):
-            pass
-
-        def write(self, s):
-            os.write(self.fd, s)
-
-    class Console(ConsoleBase):
-        def __init__(self):
-            super(Console, self).__init__()
-            self._saved_ocp = ctypes.windll.kernel32.GetConsoleOutputCP()
-            self._saved_icp = ctypes.windll.kernel32.GetConsoleCP()
-            ctypes.windll.kernel32.SetConsoleOutputCP(65001)
-            ctypes.windll.kernel32.SetConsoleCP(65001)
-            self.output = codecs.getwriter('UTF-8')(Out(sys.stdout.fileno()), 'replace')
-            # the change of the code page is not propagated to Python, manually fix it
-            sys.stderr = codecs.getwriter('UTF-8')(Out(sys.stderr.fileno()), 'replace')
-            sys.stdout = self.output
-            self.output.encoding = 'UTF-8'  # needed for input
-
-        def __del__(self):
-            ctypes.windll.kernel32.SetConsoleOutputCP(self._saved_ocp)
-            ctypes.windll.kernel32.SetConsoleCP(self._saved_icp)
-
-        def getkey(self):
-            while True:
-                z = msvcrt.getwch()
-                if z == unichr(13):
-                    return unichr(10)
-                elif z in (unichr(0), unichr(0x0e)):    # functions keys, ignore
-                    msvcrt.getwch()
-                else:
-                    return z
-
-        def cancel(self):
-            # CancelIo, CancelSynchronousIo do not seem to work when using
-            # getwch, so instead, send a key to the window with the console
-            hwnd = ctypes.windll.kernel32.GetConsoleWindow()
-            ctypes.windll.user32.PostMessageA(hwnd, 0x100, 0x0d, 0)
-
-elif os.name == 'posix':
-    import atexit
-    import termios
-    import fcntl
-
-    class Console(ConsoleBase):
-        def __init__(self):
-            super(Console, self).__init__()
-            self.fd = sys.stdin.fileno()
-            self.old = termios.tcgetattr(self.fd)
-            atexit.register(self.cleanup)
-            if sys.version_info < (3, 0):
-                self.enc_stdin = codecs.getreader(sys.stdin.encoding)(sys.stdin)
-            else:
-                self.enc_stdin = sys.stdin
-
-        def setup(self):
-            new = termios.tcgetattr(self.fd)
-            new[3] = new[3] & ~termios.ICANON & ~termios.ECHO & ~termios.ISIG
-            new[6][termios.VMIN] = 1
-            new[6][termios.VTIME] = 0
-            termios.tcsetattr(self.fd, termios.TCSANOW, new)
-
-        def getkey(self):
-            c = self.enc_stdin.read(1)
-            if c == unichr(0x7f):
-                c = unichr(8)    # map the BS key (which yields DEL) to backspace
-            return c
-
-        def cancel(self):
-            fcntl.ioctl(self.fd, termios.TIOCSTI, b'\0')
-
-        def cleanup(self):
-            termios.tcsetattr(self.fd, termios.TCSAFLUSH, self.old)
-
-else:
-    raise NotImplementedError(
-        'Sorry no implementation for your platform ({}) available.'.format(sys.platform))
-
-
-# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-
-class Transform(object):
-    """do-nothing: forward all data unchanged"""
-    def rx(self, text):
-        """text received from serial port"""
-        return text
-
-    def tx(self, text):
-        """text to be sent to serial port"""
-        return text
-
-    def echo(self, text):
-        """text to be sent but displayed on console"""
-        return text
-
-
-class CRLF(Transform):
-    """ENTER sends CR+LF"""
-
-    def tx(self, text):
-        return text.replace('\n', '\r\n')
-
-
-class CR(Transform):
-    """ENTER sends CR"""
-
-    def rx(self, text):
-        return text.replace('\r', '\n')
-
-    def tx(self, text):
-        return text.replace('\n', '\r')
-
-
-class LF(Transform):
-    """ENTER sends LF"""
-
-
-class NoTerminal(Transform):
-    """remove typical terminal control codes from input"""
-
-    REPLACEMENT_MAP = dict((x, 0x2400 + x) for x in range(32) if unichr(x) not in '\r\n\b\t')
-    REPLACEMENT_MAP.update(
-        {
-            0x7F: 0x2421,  # DEL
-            0x9B: 0x2425,  # CSI
-        })
-
-    def rx(self, text):
-        return text.translate(self.REPLACEMENT_MAP)
-
-    echo = rx
-
-
-class NoControls(NoTerminal):
-    """Remove all control codes, incl. CR+LF"""
-
-    REPLACEMENT_MAP = dict((x, 0x2400 + x) for x in range(32))
-    REPLACEMENT_MAP.update(
-        {
-            0x20: 0x2423,  # visual space
-            0x7F: 0x2421,  # DEL
-            0x9B: 0x2425,  # CSI
-        })
-
-
-class Printable(Transform):
-    """Show decimal code for all non-ASCII characters and replace most control codes"""
-
-    def rx(self, text):
-        r = []
-        for c in text:
-            if ' ' <= c < '\x7f' or c in '\r\n\b\t':
-                r.append(c)
-            elif c < ' ':
-                r.append(unichr(0x2400 + ord(c)))
-            else:
-                r.extend(unichr(0x2080 + ord(d) - 48) for d in '{:d}'.format(ord(c)))
-                r.append(' ')
-        return ''.join(r)
-
-    echo = rx
-
-
-class Colorize(Transform):
-    """Apply different colors for received and echo"""
-
-    def __init__(self):
-        # XXX make it configurable, use colorama?
-        self.input_color = '\x1b[37m'
-        self.echo_color = '\x1b[31m'
-
-    def rx(self, text):
-        return self.input_color + text
-
-    def echo(self, text):
-        return self.echo_color + text
-
-
-class DebugIO(Transform):
-    """Print what is sent and received"""
-
-    def rx(self, text):
-        sys.stderr.write(' [RX:{}] '.format(repr(text)))
-        sys.stderr.flush()
-        return text
-
-    def tx(self, text):
-        sys.stderr.write(' [TX:{}] '.format(repr(text)))
-        sys.stderr.flush()
-        return text
-
-
-# other ideas:
-# - add date/time for each newline
-# - insert newline after: a) timeout b) packet end character
-
-EOL_TRANSFORMATIONS = {
-    'crlf': CRLF,
-    'cr': CR,
-    'lf': LF,
-}
-
-TRANSFORMATIONS = {
-    'direct': Transform,    # no transformation
-    'default': NoTerminal,
-    'nocontrol': NoControls,
-    'printable': Printable,
-    'colorize': Colorize,
-    'debug': DebugIO,
-}
-
-
-# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-def ask_for_port():
-    """\
-    Show a list of ports and ask the user for a choice. To make selection
-    easier on systems with long device names, also allow the input of an
-    index.
-    """
-    sys.stderr.write('\n--- Available ports:\n')
-    ports = []
-    for n, (port, desc, hwid) in enumerate(sorted(comports()), 1):
-        sys.stderr.write('--- {:2}: {:20} {!r}\n'.format(n, port, desc))
-        ports.append(port)
-    while True:
-        port = raw_input('--- Enter port index or full name: ')
-        try:
-            index = int(port) - 1
-            if not 0 <= index < len(ports):
-                sys.stderr.write('--- Invalid index!\n')
-                continue
-        except ValueError:
-            pass
-        else:
-            port = ports[index]
-        return port
-
-
-class Miniterm(object):
-    """\
-    Terminal application. Copy data from serial port to console and vice versa.
-    Handle special keys from the console to show menu etc.
-    """
-
-    def __init__(self, serial_instance, echo=False, eol='crlf', filters=()):
-        self.console = Console()
-        self.serial = serial_instance
-        self.echo = echo
-        self.raw = False
-        self.input_encoding = 'UTF-8'
-        self.output_encoding = 'UTF-8'
-        self.eol = eol
-        self.filters = filters
-        self.update_transformations()
-        self.exit_character = 0x1d  # GS/CTRL+]
-        self.menu_character = 0x14  # Menu: CTRL+T
-        self.alive = None
-        self._reader_alive = None
-        self.receiver_thread = None
-        self.rx_decoder = None
-        self.tx_decoder = None
-
-    def _start_reader(self):
-        """Start reader thread"""
-        self._reader_alive = True
-        # start serial->console thread
-        self.receiver_thread = threading.Thread(target=self.reader, name='rx')
-        self.receiver_thread.daemon = True
-        self.receiver_thread.start()
-
-    def _stop_reader(self):
-        """Stop reader thread only, wait for clean exit of thread"""
-        self._reader_alive = False
-        if hasattr(self.serial, 'cancel_read'):
-            self.serial.cancel_read()
-        self.receiver_thread.join()
-
-    def start(self):
-        """start worker threads"""
-        self.alive = True
-        self._start_reader()
-        # enter console->serial loop
-        self.transmitter_thread = threading.Thread(target=self.writer, name='tx')
-        self.transmitter_thread.daemon = True
-        self.transmitter_thread.start()
-        self.console.setup()
-
-    def stop(self):
-        """set flag to stop worker threads"""
-        self.alive = False
-
-    def join(self, transmit_only=False):
-        """wait for worker threads to terminate"""
-        self.transmitter_thread.join()
-        if not transmit_only:
-            if hasattr(self.serial, 'cancel_read'):
-                self.serial.cancel_read()
-            self.receiver_thread.join()
-
-    def close(self):
-        self.serial.close()
-
-    def update_transformations(self):
-        """take list of transformation classes and instantiate them for rx and tx"""
-        transformations = [EOL_TRANSFORMATIONS[self.eol]] + [TRANSFORMATIONS[f]
-                                                             for f in self.filters]
-        self.tx_transformations = [t() for t in transformations]
-        self.rx_transformations = list(reversed(self.tx_transformations))
-
-    def set_rx_encoding(self, encoding, errors='replace'):
-        """set encoding for received data"""
-        self.input_encoding = encoding
-        self.rx_decoder = codecs.getincrementaldecoder(encoding)(errors)
-
-    def set_tx_encoding(self, encoding, errors='replace'):
-        """set encoding for transmitted data"""
-        self.output_encoding = encoding
-        self.tx_encoder = codecs.getincrementalencoder(encoding)(errors)
-
-    def dump_port_settings(self):
-        """Write current settings to sys.stderr"""
-        sys.stderr.write("\n--- Settings: {p.name}  {p.baudrate},{p.bytesize},{p.parity},{p.stopbits}\n".format(
-            p=self.serial))
-        sys.stderr.write('--- RTS: {:8}  DTR: {:8}  BREAK: {:8}\n'.format(
-            ('active' if self.serial.rts else 'inactive'),
-            ('active' if self.serial.dtr else 'inactive'),
-            ('active' if self.serial.break_condition else 'inactive')))
-        try:
-            sys.stderr.write('--- CTS: {:8}  DSR: {:8}  RI: {:8}  CD: {:8}\n'.format(
-                ('active' if self.serial.cts else 'inactive'),
-                ('active' if self.serial.dsr else 'inactive'),
-                ('active' if self.serial.ri else 'inactive'),
-                ('active' if self.serial.cd else 'inactive')))
-        except serial.SerialException:
-            # on RFC 2217 ports, it can happen if no modem state notification was
-            # yet received. ignore this error.
-            pass
-        sys.stderr.write('--- software flow control: {}\n'.format('active' if self.serial.xonxoff else 'inactive'))
-        sys.stderr.write('--- hardware flow control: {}\n'.format('active' if self.serial.rtscts else 'inactive'))
-        sys.stderr.write('--- serial input encoding: {}\n'.format(self.input_encoding))
-        sys.stderr.write('--- serial output encoding: {}\n'.format(self.output_encoding))
-        sys.stderr.write('--- EOL: {}\n'.format(self.eol.upper()))
-        sys.stderr.write('--- filters: {}\n'.format(' '.join(self.filters)))
-
-    def reader(self):
-        """loop and copy serial->console"""
-        try:
-            while self.alive and self._reader_alive:
-                # read all that is there or wait for one byte
-                data = self.serial.read(self.serial.in_waiting or 1)
-                if data:
-                    if self.raw:
-                        self.console.write_bytes(data)
-                    else:
-                        text = self.rx_decoder.decode(data)
-                        for transformation in self.rx_transformations:
-                            text = transformation.rx(text)
-                        self.console.write(text)
-        except serial.SerialException:
-            self.alive = False
-            self.console.cancel()
-            raise       # XXX handle instead of re-raise?
-
-    def writer(self):
-        """\
-        Loop and copy console->serial until self.exit_character character is
-        found. When self.menu_character is found, interpret the next key
-        locally.
-        """
-        menu_active = False
-        try:
-            while self.alive:
-                try:
-                    c = self.console.getkey()
-                except KeyboardInterrupt:
-                    c = '\x03'
-                if not self.alive:
-                    break
-                if menu_active:
-                    self.handle_menu_key(c)
-                    menu_active = False
-                elif c == self.menu_character:
-                    menu_active = True      # next char will be for menu
-                elif c == self.exit_character:
-                    self.stop()             # exit app
-                    break
-                else:
-                    #~ if self.raw:
-                    text = c
-                    for transformation in self.tx_transformations:
-                        text = transformation.tx(text)
-                    self.serial.write(self.tx_encoder.encode(text))
-                    if self.echo:
-                        echo_text = c
-                        for transformation in self.tx_transformations:
-                            echo_text = transformation.echo(echo_text)
-                        self.console.write(echo_text)
-        except:
-            self.alive = False
-            raise
-
-    def handle_menu_key(self, c):
-        """Implement a simple menu / settings"""
-        if c == self.menu_character or c == self.exit_character:
-            # Menu/exit character again -> send itself
-            self.serial.write(self.tx_encoder.encode(c))
-            if self.echo:
-                self.console.write(c)
-        elif c == '\x15':                       # CTRL+U -> upload file
-            self.upload_file()
-        elif c in '\x08hH?':                    # CTRL+H, h, H, ? -> Show help
-            sys.stderr.write(self.get_help_text())
-        elif c == '\x12':                       # CTRL+R -> Toggle RTS
-            self.serial.rts = not self.serial.rts
-            sys.stderr.write('--- RTS {} ---\n'.format('active' if self.serial.rts else 'inactive'))
-        elif c == '\x04':                       # CTRL+D -> Toggle DTR
-            self.serial.dtr = not self.serial.dtr
-            sys.stderr.write('--- DTR {} ---\n'.format('active' if self.serial.dtr else 'inactive'))
-        elif c == '\x02':                       # CTRL+B -> toggle BREAK condition
-            self.serial.break_condition = not self.serial.break_condition
-            sys.stderr.write('--- BREAK {} ---\n'.format('active' if self.serial.break_condition else 'inactive'))
-        elif c == '\x05':                       # CTRL+E -> toggle local echo
-            self.echo = not self.echo
-            sys.stderr.write('--- local echo {} ---\n'.format('active' if self.echo else 'inactive'))
-        elif c == '\x06':                       # CTRL+F -> edit filters
-            self.change_filter()
-        elif c == '\x0c':                       # CTRL+L -> EOL mode
-            modes = list(EOL_TRANSFORMATIONS)  # keys
-            eol = modes.index(self.eol) + 1
-            if eol >= len(modes):
-                eol = 0
-            self.eol = modes[eol]
-            sys.stderr.write('--- EOL: {} ---\n'.format(self.eol.upper()))
-            self.update_transformations()
-        elif c == '\x01':                       # CTRL+A -> set encoding
-            self.change_encoding()
-        elif c == '\x09':                       # CTRL+I -> info
-            self.dump_port_settings()
-        #~ elif c == '\x01':                       # CTRL+A -> cycle escape mode
-        #~ elif c == '\x0c':                       # CTRL+L -> cycle linefeed mode
-        elif c in 'pP':                         # P -> change port
-            self.change_port()
-        elif c in 'sS':                         # S -> suspend / open port temporarily
-            self.suspend_port()
-        elif c in 'bB':                         # B -> change baudrate
-            self.change_baudrate()
-        elif c == '8':                          # 8 -> change to 8 bits
-            self.serial.bytesize = serial.EIGHTBITS
-            self.dump_port_settings()
-        elif c == '7':                          # 7 -> change to 8 bits
-            self.serial.bytesize = serial.SEVENBITS
-            self.dump_port_settings()
-        elif c in 'eE':                         # E -> change to even parity
-            self.serial.parity = serial.PARITY_EVEN
-            self.dump_port_settings()
-        elif c in 'oO':                         # O -> change to odd parity
-            self.serial.parity = serial.PARITY_ODD
-            self.dump_port_settings()
-        elif c in 'mM':                         # M -> change to mark parity
-            self.serial.parity = serial.PARITY_MARK
-            self.dump_port_settings()
-        elif c in 'sS':                         # S -> change to space parity
-            self.serial.parity = serial.PARITY_SPACE
-            self.dump_port_settings()
-        elif c in 'nN':                         # N -> change to no parity
-            self.serial.parity = serial.PARITY_NONE
-            self.dump_port_settings()
-        elif c == '1':                          # 1 -> change to 1 stop bits
-            self.serial.stopbits = serial.STOPBITS_ONE
-            self.dump_port_settings()
-        elif c == '2':                          # 2 -> change to 2 stop bits
-            self.serial.stopbits = serial.STOPBITS_TWO
-            self.dump_port_settings()
-        elif c == '3':                          # 3 -> change to 1.5 stop bits
-            self.serial.stopbits = serial.STOPBITS_ONE_POINT_FIVE
-            self.dump_port_settings()
-        elif c in 'xX':                         # X -> change software flow control
-            self.serial.xonxoff = (c == 'X')
-            self.dump_port_settings()
-        elif c in 'rR':                         # R -> change hardware flow control
-            self.serial.rtscts = (c == 'R')
-            self.dump_port_settings()
-        else:
-            sys.stderr.write('--- unknown menu character {} --\n'.format(key_description(c)))
-
-    def upload_file(self):
-        """Ask user for filenname and send its contents"""
-        sys.stderr.write('\n--- File to upload: ')
-        sys.stderr.flush()
-        with self.console:
-            filename = sys.stdin.readline().rstrip('\r\n')
-            if filename:
-                try:
-                    with open(filename, 'rb') as f:
-                        sys.stderr.write('--- Sending file {} ---\n'.format(filename))
-                        while True:
-                            block = f.read(1024)
-                            if not block:
-                                break
-                            self.serial.write(block)
-                            # Wait for output buffer to drain.
-                            self.serial.flush()
-                            sys.stderr.write('.')   # Progress indicator.
-                    sys.stderr.write('\n--- File {} sent ---\n'.format(filename))
-                except IOError as e:
-                    sys.stderr.write('--- ERROR opening file {}: {} ---\n'.format(filename, e))
-
-    def change_filter(self):
-        """change the i/o transformations"""
-        sys.stderr.write('\n--- Available Filters:\n')
-        sys.stderr.write('\n'.join(
-            '---   {:<10} = {.__doc__}'.format(k, v)
-            for k, v in sorted(TRANSFORMATIONS.items())))
-        sys.stderr.write('\n--- Enter new filter name(s) [{}]: '.format(' '.join(self.filters)))
-        with self.console:
-            new_filters = sys.stdin.readline().lower().split()
-        if new_filters:
-            for f in new_filters:
-                if f not in TRANSFORMATIONS:
-                    sys.stderr.write('--- unknown filter: {}\n'.format(repr(f)))
-                    break
-            else:
-                self.filters = new_filters
-                self.update_transformations()
-        sys.stderr.write('--- filters: {}\n'.format(' '.join(self.filters)))
-
-    def change_encoding(self):
-        """change encoding on the serial port"""
-        sys.stderr.write('\n--- Enter new encoding name [{}]: '.format(self.input_encoding))
-        with self.console:
-            new_encoding = sys.stdin.readline().strip()
-        if new_encoding:
-            try:
-                codecs.lookup(new_encoding)
-            except LookupError:
-                sys.stderr.write('--- invalid encoding name: {}\n'.format(new_encoding))
-            else:
-                self.set_rx_encoding(new_encoding)
-                self.set_tx_encoding(new_encoding)
-        sys.stderr.write('--- serial input encoding: {}\n'.format(self.input_encoding))
-        sys.stderr.write('--- serial output encoding: {}\n'.format(self.output_encoding))
-
-    def change_baudrate(self):
-        """change the baudrate"""
-        sys.stderr.write('\n--- Baudrate: ')
-        sys.stderr.flush()
-        with self.console:
-            backup = self.serial.baudrate
-            try:
-                self.serial.baudrate = int(sys.stdin.readline().strip())
-            except ValueError as e:
-                sys.stderr.write('--- ERROR setting baudrate: {} ---\n'.format(e))
-                self.serial.baudrate = backup
-            else:
-                self.dump_port_settings()
-
-    def change_port(self):
-        """Have a conversation with the user to change the serial port"""
-        with self.console:
-            try:
-                port = ask_for_port()
-            except KeyboardInterrupt:
-                port = None
-        if port and port != self.serial.port:
-            # reader thread needs to be shut down
-            self._stop_reader()
-            # save settings
-            settings = self.serial.getSettingsDict()
-            try:
-                new_serial = serial.serial_for_url(port, do_not_open=True)
-                # restore settings and open
-                new_serial.applySettingsDict(settings)
-                new_serial.rts = self.serial.rts
-                new_serial.dtr = self.serial.dtr
-                new_serial.open()
-                new_serial.break_condition = self.serial.break_condition
-            except Exception as e:
-                sys.stderr.write('--- ERROR opening new port: {} ---\n'.format(e))
-                new_serial.close()
-            else:
-                self.serial.close()
-                self.serial = new_serial
-                sys.stderr.write('--- Port changed to: {} ---\n'.format(self.serial.port))
-            # and restart the reader thread
-            self._start_reader()
-
-    def suspend_port(self):
-        """\
-        open port temporarily, allow reconnect, exit and port change to get
-        out of the loop
-        """
-        # reader thread needs to be shut down
-        self._stop_reader()
-        self.serial.close()
-        sys.stderr.write('\n--- Port closed: {} ---\n'.format(self.serial.port))
-        do_change_port = False
-        while not self.serial.is_open:
-            sys.stderr.write('--- Quit: {exit} | p: port change | any other key to reconnect ---\n'.format(
-                exit=key_description(self.exit_character)))
-            k = self.console.getkey()
-            if k == self.exit_character:
-                self.stop()             # exit app
-                break
-            elif k in 'pP':
-                do_change_port = True
-                break
-            try:
-                self.serial.open()
-            except Exception as e:
-                sys.stderr.write('--- ERROR opening port: {} ---\n'.format(e))
-        if do_change_port:
-            self.change_port()
-        else:
-            # and restart the reader thread
-            self._start_reader()
-            sys.stderr.write('--- Port opened: {} ---\n'.format(self.serial.port))
-
-    def get_help_text(self):
-        """return the help text"""
-        # help text, starts with blank line!
-        return """
---- pySerial ({version}) - miniterm - help
----
---- {exit:8} Exit program
---- {menu:8} Menu escape key, followed by:
---- Menu keys:
----    {menu:7} Send the menu character itself to remote
----    {exit:7} Send the exit character itself to remote
----    {info:7} Show info
----    {upload:7} Upload file (prompt will be shown)
----    {repr:7} encoding
----    {filter:7} edit filters
---- Toggles:
----    {rts:7} RTS   {dtr:7} DTR   {brk:7} BREAK
----    {echo:7} echo  {eol:7} EOL
----
---- Port settings ({menu} followed by the following):
----    p          change port
----    7 8        set data bits
----    N E O S M  change parity (None, Even, Odd, Space, Mark)
----    1 2 3      set stop bits (1, 2, 1.5)
----    b          change baud rate
----    x X        disable/enable software flow control
----    r R        disable/enable hardware flow control
-""".format(version=getattr(serial, 'VERSION', 'unknown version'),
-           exit=key_description(self.exit_character),
-           menu=key_description(self.menu_character),
-           rts=key_description('\x12'),
-           dtr=key_description('\x04'),
-           brk=key_description('\x02'),
-           echo=key_description('\x05'),
-           info=key_description('\x09'),
-           upload=key_description('\x15'),
-           repr=key_description('\x01'),
-           filter=key_description('\x06'),
-           eol=key_description('\x0c'))
-
-
-# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-# default args can be used to override when calling main() from an other script
-# e.g to create a miniterm-my-device.py
-def main(default_port=None, default_baudrate=9600, default_rts=None, default_dtr=None):
-    """Command line tool, entry point"""
-
-    import argparse
-
-    parser = argparse.ArgumentParser(
-        description="Miniterm - A simple terminal program for the serial port.")
-
-    parser.add_argument(
-        "port",
-        nargs='?',
-        help="serial port name ('-' to show port list)",
-        default=default_port)
-
-    parser.add_argument(
-        "baudrate",
-        nargs='?',
-        type=int,
-        help="set baud rate, default: %(default)s",
-        default=default_baudrate)
-
-    group = parser.add_argument_group("port settings")
-
-    group.add_argument(
-        "--parity",
-        choices=['N', 'E', 'O', 'S', 'M'],
-        type=lambda c: c.upper(),
-        help="set parity, one of {N E O S M}, default: N",
-        default='N')
-
-    group.add_argument(
-        "--rtscts",
-        action="store_true",
-        help="enable RTS/CTS flow control (default off)",
-        default=False)
-
-    group.add_argument(
-        "--xonxoff",
-        action="store_true",
-        help="enable software flow control (default off)",
-        default=False)
-
-    group.add_argument(
-        "--rts",
-        type=int,
-        help="set initial RTS line state (possible values: 0, 1)",
-        default=default_rts)
-
-    group.add_argument(
-        "--dtr",
-        type=int,
-        help="set initial DTR line state (possible values: 0, 1)",
-        default=default_dtr)
-
-    group.add_argument(
-        "--ask",
-        action="store_true",
-        help="ask again for port when open fails",
-        default=False)
-
-    group = parser.add_argument_group("data handling")
-
-    group.add_argument(
-        "-e", "--echo",
-        action="store_true",
-        help="enable local echo (default off)",
-        default=False)
-
-    group.add_argument(
-        "--encoding",
-        dest="serial_port_encoding",
-        metavar="CODEC",
-        help="set the encoding for the serial port (e.g. hexlify, Latin1, UTF-8), default: %(default)s",
-        default='UTF-8')
-
-    group.add_argument(
-        "-f", "--filter",
-        action="append",
-        metavar="NAME",
-        help="add text transformation",
-        default=[])
-
-    group.add_argument(
-        "--eol",
-        choices=['CR', 'LF', 'CRLF'],
-        type=lambda c: c.upper(),
-        help="end of line mode",
-        default='CRLF')
-
-    group.add_argument(
-        "--raw",
-        action="store_true",
-        help="Do no apply any encodings/transformations",
-        default=False)
-
-    group = parser.add_argument_group("hotkeys")
-
-    group.add_argument(
-        "--exit-char",
-        type=int,
-        metavar='NUM',
-        help="Unicode of special character that is used to exit the application, default: %(default)s",
-        default=0x1d)  # GS/CTRL+]
-
-    group.add_argument(
-        "--menu-char",
-        type=int,
-        metavar='NUM',
-        help="Unicode code of special character that is used to control miniterm (menu), default: %(default)s",
-        default=0x14)  # Menu: CTRL+T
-
-    group = parser.add_argument_group("diagnostics")
-
-    group.add_argument(
-        "-q", "--quiet",
-        action="store_true",
-        help="suppress non-error messages",
-        default=False)
-
-    group.add_argument(
-        "--develop",
-        action="store_true",
-        help="show Python traceback on error",
-        default=False)
-
-    args = parser.parse_args()
-
-    if args.menu_char == args.exit_char:
-        parser.error('--exit-char can not be the same as --menu-char')
-
-    if args.filter:
-        if 'help' in args.filter:
-            sys.stderr.write('Available filters:\n')
-            sys.stderr.write('\n'.join(
-                '{:<10} = {.__doc__}'.format(k, v)
-                for k, v in sorted(TRANSFORMATIONS.items())))
-            sys.stderr.write('\n')
-            sys.exit(1)
-        filters = args.filter
-    else:
-        filters = ['default']
-
-    while True:
-        # no port given on command line -> ask user now
-        if args.port is None or args.port == '-':
-            try:
-                args.port = ask_for_port()
-            except KeyboardInterrupt:
-                sys.stderr.write('\n')
-                parser.error('user aborted and port is not given')
-            else:
-                if not args.port:
-                    parser.error('port is not given')
-        try:
-            serial_instance = serial.serial_for_url(
-                args.port,
-                args.baudrate,
-                parity=args.parity,
-                rtscts=args.rtscts,
-                xonxoff=args.xonxoff,
-                do_not_open=True)
-
-            if not hasattr(serial_instance, 'cancel_read'):
-                # enable timeout for alive flag polling if cancel_read is not available
-                serial_instance.timeout = 1
-
-            if args.dtr is not None:
-                if not args.quiet:
-                    sys.stderr.write('--- forcing DTR {}\n'.format('active' if args.dtr else 'inactive'))
-                serial_instance.dtr = args.dtr
-            if args.rts is not None:
-                if not args.quiet:
-                    sys.stderr.write('--- forcing RTS {}\n'.format('active' if args.rts else 'inactive'))
-                serial_instance.rts = args.rts
-
-            serial_instance.open()
-        except serial.SerialException as e:
-            sys.stderr.write('could not open port {}: {}\n'.format(repr(args.port), e))
-            if args.develop:
-                raise
-            if not args.ask:
-                sys.exit(1)
-            else:
-                args.port = '-'
-        else:
-            break
-
-    miniterm = Miniterm(
-        serial_instance,
-        echo=args.echo,
-        eol=args.eol.lower(),
-        filters=filters)
-    miniterm.exit_character = unichr(args.exit_char)
-    miniterm.menu_character = unichr(args.menu_char)
-    miniterm.raw = args.raw
-    miniterm.set_rx_encoding(args.serial_port_encoding)
-    miniterm.set_tx_encoding(args.serial_port_encoding)
-
-    if not args.quiet:
-        sys.stderr.write('--- Miniterm on {p.name}  {p.baudrate},{p.bytesize},{p.parity},{p.stopbits} ---\n'.format(
-            p=miniterm.serial))
-        sys.stderr.write('--- Quit: {} | Menu: {} | Help: {} followed by {} ---\n'.format(
-            key_description(miniterm.exit_character),
-            key_description(miniterm.menu_character),
-            key_description(miniterm.menu_character),
-            key_description('\x08')))
-
-    miniterm.start()
-    try:
-        miniterm.join(True)
-    except KeyboardInterrupt:
-        pass
-    if not args.quiet:
-        sys.stderr.write("\n--- exit ---\n")
-    miniterm.join()
-    miniterm.close()
-
-# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-if __name__ == '__main__':
-    main()

utils/venv/bin/pip

@@ -1,10 +0,0 @@
-#!/root/projekti/TeraHz/utils/venv/bin/python3
-# -*- coding: utf-8 -*-
-import re
-import sys
-
-from pip._internal import main
-
-if __name__ == '__main__':
-    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
-    sys.exit(main())

utils/venv/bin/pip3

@@ -1,10 +0,0 @@
-#!/root/projekti/TeraHz/utils/venv/bin/python3
-# -*- coding: utf-8 -*-
-import re
-import sys
-
-from pip._internal import main
-
-if __name__ == '__main__':
-    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
-    sys.exit(main())

utils/venv/bin/pip3.6

@@ -1,10 +0,0 @@
-#!/root/projekti/TeraHz/utils/venv/bin/python3
-# -*- coding: utf-8 -*-
-import re
-import sys
-
-from pip._internal import main
-
-if __name__ == '__main__':
-    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
-    sys.exit(main())

utils/venv/lib/python3.6/site-packages/cycler-0.10.0.dist-info/DESCRIPTION.rst

@@ -1,3 +0,0 @@
-UNKNOWN
-
-

utils/venv/lib/python3.6/site-packages/cycler-0.10.0.dist-info/INSTALLER

@@ -1 +0,0 @@
-pip

utils/venv/lib/python3.6/site-packages/cycler-0.10.0.dist-info/METADATA

@@ -1,25 +0,0 @@
-Metadata-Version: 2.0
-Name: cycler
-Version: 0.10.0
-Summary: Composable style cycles
-Home-page: http://github.com/matplotlib/cycler
-Author: Thomas A Caswell
-Author-email: matplotlib-users@python.org
-License: BSD
-Keywords: cycle kwargs
-Platform: Cross platform (Linux
-Platform: Mac OSX
-Platform: Windows)
-Classifier: Development Status :: 4 - Beta
-Classifier: Programming Language :: Python :: 2
-Classifier: Programming Language :: Python :: 2.6
-Classifier: Programming Language :: Python :: 2.7
-Classifier: Programming Language :: Python :: 3
-Classifier: Programming Language :: Python :: 3.3
-Classifier: Programming Language :: Python :: 3.4
-Classifier: Programming Language :: Python :: 3.5
-Requires-Dist: six
-
-UNKNOWN
-
-

utils/venv/lib/python3.6/site-packages/cycler-0.10.0.dist-info/RECORD

@@ -1,9 +0,0 @@
-__pycache__/cycler.cpython-36.pyc,,
-cycler-0.10.0.dist-info/DESCRIPTION.rst,sha256=OCTuuN6LcWulhHS3d5rfjdsQtW22n7HENFRh6jC6ego,10
-cycler-0.10.0.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4
-cycler-0.10.0.dist-info/METADATA,sha256=aWX1pyo7D2hSDNZ2Q6Zl7DxhUQdpyu1O5uNABnvz000,722
-cycler-0.10.0.dist-info/RECORD,,
-cycler-0.10.0.dist-info/WHEEL,sha256=o2k-Qa-RMNIJmUdIc7KU6VWR_ErNRbWNlxDIpl7lm34,110
-cycler-0.10.0.dist-info/metadata.json,sha256=CCBpg-KQU-VRL1unJcHPWKQeQbB84G0j7-BeCj7YUbU,875
-cycler-0.10.0.dist-info/top_level.txt,sha256=D8BVVDdAAelLb2FOEz7lDpc6-AL21ylKPrMhtG6yzyE,7
-cycler.py,sha256=ed3G39unvVEBrBZVDwnE0FFroRNsOLkbJ_TwIT5CjCU,15959

utils/venv/lib/python3.6/site-packages/cycler-0.10.0.dist-info/WHEEL

@@ -1,6 +0,0 @@
-Wheel-Version: 1.0
-Generator: bdist_wheel (0.29.0)
-Root-Is-Purelib: true
-Tag: py2-none-any
-Tag: py3-none-any
-

utils/venv/lib/python3.6/site-packages/cycler-0.10.0.dist-info/metadata.json

@@ -1 +0,0 @@
-{"classifiers": ["Development Status :: 4 - Beta", "Programming Language :: Python :: 2", "Programming Language :: Python :: 2.6", "Programming Language :: Python :: 2.7", "Programming Language :: Python :: 3", "Programming Language :: Python :: 3.3", "Programming Language :: Python :: 3.4", "Programming Language :: Python :: 3.5"], "extensions": {"python.details": {"contacts": [{"email": "matplotlib-users@python.org", "name": "Thomas A Caswell", "role": "author"}], "document_names": {"description": "DESCRIPTION.rst"}, "project_urls": {"Home": "http://github.com/matplotlib/cycler"}}}, "extras": [], "generator": "bdist_wheel (0.29.0)", "keywords": ["cycle", "kwargs"], "license": "BSD", "metadata_version": "2.0", "name": "cycler", "platform": "Cross platform (Linux", "run_requires": [{"requires": ["six"]}], "summary": "Composable style cycles", "version": "0.10.0"}

utils/venv/lib/python3.6/site-packages/cycler-0.10.0.dist-info/top_level.txt

@@ -1 +0,0 @@
-cycler

utils/venv/lib/python3.6/site-packages/cycler.py

@@ -1,558 +0,0 @@
-"""
-Cycler
-======
-
-Cycling through combinations of values, producing dictionaries.
-
-You can add cyclers::
-
-    from cycler import cycler
-    cc = (cycler(color=list('rgb')) +
-          cycler(linestyle=['-', '--', '-.']))
-    for d in cc:
-        print(d)
-
-Results in::
-
-    {'color': 'r', 'linestyle': '-'}
-    {'color': 'g', 'linestyle': '--'}
-    {'color': 'b', 'linestyle': '-.'}
-
-
-You can multiply cyclers::
-
-    from cycler import cycler
-    cc = (cycler(color=list('rgb')) *
-          cycler(linestyle=['-', '--', '-.']))
-    for d in cc:
-        print(d)
-
-Results in::
-
-    {'color': 'r', 'linestyle': '-'}
-    {'color': 'r', 'linestyle': '--'}
-    {'color': 'r', 'linestyle': '-.'}
-    {'color': 'g', 'linestyle': '-'}
-    {'color': 'g', 'linestyle': '--'}
-    {'color': 'g', 'linestyle': '-.'}
-    {'color': 'b', 'linestyle': '-'}
-    {'color': 'b', 'linestyle': '--'}
-    {'color': 'b', 'linestyle': '-.'}
-"""
-
-from __future__ import (absolute_import, division, print_function,
-                        unicode_literals)
-
-import six
-from itertools import product, cycle
-from six.moves import zip, reduce
-from operator import mul, add
-import copy
-
-__version__ = '0.10.0'
-
-
-def _process_keys(left, right):
-    """
-    Helper function to compose cycler keys
-
-    Parameters
-    ----------
-    left, right : iterable of dictionaries or None
-        The cyclers to be composed
-    Returns
-    -------
-    keys : set
-        The keys in the composition of the two cyclers
-    """
-    l_peek = next(iter(left)) if left is not None else {}
-    r_peek = next(iter(right)) if right is not None else {}
-    l_key = set(l_peek.keys())
-    r_key = set(r_peek.keys())
-    if l_key & r_key:
-        raise ValueError("Can not compose overlapping cycles")
-    return l_key | r_key
-
-
-class Cycler(object):
-    """
-    Composable cycles
-
-    This class has compositions methods:
-
-    ``+``
-      for 'inner' products (zip)
-
-    ``+=``
-      in-place ``+``
-
-    ``*``
-      for outer products (itertools.product) and integer multiplication
-
-    ``*=``
-      in-place ``*``
-
-    and supports basic slicing via ``[]``
-
-    Parameters
-    ----------
-    left : Cycler or None
-        The 'left' cycler
-
-    right : Cycler or None
-        The 'right' cycler
-
-    op : func or None
-        Function which composes the 'left' and 'right' cyclers.
-
-    """
-    def __call__(self):
-        return cycle(self)
-
-    def __init__(self, left, right=None, op=None):
-        """Semi-private init
-
-        Do not use this directly, use `cycler` function instead.
-        """
-        if isinstance(left, Cycler):
-            self._left = Cycler(left._left, left._right, left._op)
-        elif left is not None:
-            # Need to copy the dictionary or else that will be a residual
-            # mutable that could lead to strange errors
-            self._left = [copy.copy(v) for v in left]
-        else:
-            self._left = None
-
-        if isinstance(right, Cycler):
-            self._right = Cycler(right._left, right._right, right._op)
-        elif right is not None:
-            # Need to copy the dictionary or else that will be a residual
-            # mutable that could lead to strange errors
-            self._right = [copy.copy(v) for v in right]
-        else:
-            self._right = None
-
-        self._keys = _process_keys(self._left, self._right)
-        self._op = op
-
-    @property
-    def keys(self):
-        """
-        The keys this Cycler knows about
-        """
-        return set(self._keys)
-
-    def change_key(self, old, new):
-        """
-        Change a key in this cycler to a new name.
-        Modification is performed in-place.
-
-        Does nothing if the old key is the same as the new key.
-        Raises a ValueError if the new key is already a key.
-        Raises a KeyError if the old key isn't a key.
-
-        """
-        if old == new:
-            return
-        if new in self._keys:
-            raise ValueError("Can't replace %s with %s, %s is already a key" %
-                             (old, new, new))
-        if old not in self._keys:
-            raise KeyError("Can't replace %s with %s, %s is not a key" %
-                           (old, new, old))
-
-        self._keys.remove(old)
-        self._keys.add(new)
-
-        if self._right is not None and old in self._right.keys:
-            self._right.change_key(old, new)
-
-        # self._left should always be non-None
-        # if self._keys is non-empty.
-        elif isinstance(self._left, Cycler):
-            self._left.change_key(old, new)
-        else:
-            # It should be completely safe at this point to
-            # assume that the old key can be found in each
-            # iteration.
-            self._left = [{new: entry[old]} for entry in self._left]
-
-    def _compose(self):
-        """
-        Compose the 'left' and 'right' components of this cycle
-        with the proper operation (zip or product as of now)
-        """
-        for a, b in self._op(self._left, self._right):
-            out = dict()
-            out.update(a)
-            out.update(b)
-            yield out
-
-    @classmethod
-    def _from_iter(cls, label, itr):
-        """
-        Class method to create 'base' Cycler objects
-        that do not have a 'right' or 'op' and for which
-        the 'left' object is not another Cycler.
-
-        Parameters
-        ----------
-        label : str
-            The property key.
-
-        itr : iterable
-            Finite length iterable of the property values.
-
-        Returns
-        -------
-        cycler : Cycler
-            New 'base' `Cycler`
-        """
-        ret = cls(None)
-        ret._left = list({label: v} for v in itr)
-        ret._keys = set([label])
-        return ret
-
-    def __getitem__(self, key):
-        # TODO : maybe add numpy style fancy slicing
-        if isinstance(key, slice):
-            trans = self.by_key()
-            return reduce(add, (_cycler(k, v[key])
-                                for k, v in six.iteritems(trans)))
-        else:
-            raise ValueError("Can only use slices with Cycler.__getitem__")
-
-    def __iter__(self):
-        if self._right is None:
-            return iter(dict(l) for l in self._left)
-
-        return self._compose()
-
-    def __add__(self, other):
-        """
-        Pair-wise combine two equal length cycles (zip)
-
-        Parameters
-        ----------
-        other : Cycler
-           The second Cycler
-        """
-        if len(self) != len(other):
-            raise ValueError("Can only add equal length cycles, "
-                             "not {0} and {1}".format(len(self), len(other)))
-        return Cycler(self, other, zip)
-
-    def __mul__(self, other):
-        """
-        Outer product of two cycles (`itertools.product`) or integer
-        multiplication.
-
-        Parameters
-        ----------
-        other : Cycler or int
-           The second Cycler or integer
-        """
-        if isinstance(other, Cycler):
-            return Cycler(self, other, product)
-        elif isinstance(other, int):
-            trans = self.by_key()
-            return reduce(add, (_cycler(k, v*other)
-                                for k, v in six.iteritems(trans)))
-        else:
-            return NotImplemented
-
-    def __rmul__(self, other):
-        return self * other
-
-    def __len__(self):
-        op_dict = {zip: min, product: mul}
-        if self._right is None:
-            return len(self._left)
-        l_len = len(self._left)
-        r_len = len(self._right)
-        return op_dict[self._op](l_len, r_len)
-
-    def __iadd__(self, other):
-        """
-        In-place pair-wise combine two equal length cycles (zip)
-
-        Parameters
-        ----------
-        other : Cycler
-           The second Cycler
-        """
-        if not isinstance(other, Cycler):
-            raise TypeError("Cannot += with a non-Cycler object")
-        # True shallow copy of self is fine since this is in-place
-        old_self = copy.copy(self)
-        self._keys = _process_keys(old_self, other)
-        self._left = old_self
-        self._op = zip
-        self._right = Cycler(other._left, other._right, other._op)
-        return self
-
-    def __imul__(self, other):
-        """
-        In-place outer product of two cycles (`itertools.product`)
-
-        Parameters
-        ----------
-        other : Cycler
-           The second Cycler
-        """
-        if not isinstance(other, Cycler):
-            raise TypeError("Cannot *= with a non-Cycler object")
-        # True shallow copy of self is fine since this is in-place
-        old_self = copy.copy(self)
-        self._keys = _process_keys(old_self, other)
-        self._left = old_self
-        self._op = product
-        self._right = Cycler(other._left, other._right, other._op)
-        return self
-
-    def __eq__(self, other):
-        """
-        Check equality
-        """
-        if len(self) != len(other):
-            return False
-        if self.keys ^ other.keys:
-            return False
-
-        return all(a == b for a, b in zip(self, other))
-
-    def __repr__(self):
-        op_map = {zip: '+', product: '*'}
-        if self._right is None:
-            lab = self.keys.pop()
-            itr = list(v[lab] for v in self)
-            return "cycler({lab!r}, {itr!r})".format(lab=lab, itr=itr)
-        else:
-            op = op_map.get(self._op, '?')
-            msg = "({left!r} {op} {right!r})"
-            return msg.format(left=self._left, op=op, right=self._right)
-
-    def _repr_html_(self):
-        # an table showing the value of each key through a full cycle
-        output = "<table>"
-        sorted_keys = sorted(self.keys, key=repr)
-        for key in sorted_keys:
-            output += "<th>{key!r}</th>".format(key=key)
-        for d in iter(self):
-            output += "<tr>"
-            for k in sorted_keys:
-                output += "<td>{val!r}</td>".format(val=d[k])
-            output += "</tr>"
-        output += "</table>"
-        return output
-
-    def by_key(self):
-        """Values by key
-
-        This returns the transposed values of the cycler.  Iterating
-        over a `Cycler` yields dicts with a single value for each key,
-        this method returns a `dict` of `list` which are the values
-        for the given key.
-
-        The returned value can be used to create an equivalent `Cycler`
-        using only `+`.
-
-        Returns
-        -------
-        transpose : dict
-            dict of lists of the values for each key.
-        """
-
-        # TODO : sort out if this is a bottle neck, if there is a better way
-        # and if we care.
-
-        keys = self.keys
-        # change this to dict comprehension when drop 2.6
-        out = dict((k,  list()) for k in keys)
-
-        for d in self:
-            for k in keys:
-                out[k].append(d[k])
-        return out
-
-    # for back compatibility
-    _transpose = by_key
-
-    def simplify(self):
-        """Simplify the Cycler
-
-        Returned as a composition using only sums (no multiplications)
-
-        Returns
-        -------
-        simple : Cycler
-            An equivalent cycler using only summation"""
-        # TODO: sort out if it is worth the effort to make sure this is
-        # balanced.  Currently it is is
-        # (((a + b) + c) + d) vs
-        # ((a + b) + (c + d))
-        # I would believe that there is some performance implications
-
-        trans = self.by_key()
-        return reduce(add, (_cycler(k, v) for k, v in six.iteritems(trans)))
-
-    def concat(self, other):
-        """Concatenate this cycler and an other.
-
-        The keys must match exactly.
-
-        This returns a single Cycler which is equivalent to
-        `itertools.chain(self, other)`
-
-        Examples
-        --------
-
-        >>> num = cycler('a', range(3))
-        >>> let = cycler('a', 'abc')
-        >>> num.concat(let)
-        cycler('a', [0, 1, 2, 'a', 'b', 'c'])
-
-        Parameters
-        ----------
-        other : `Cycler`
-            The `Cycler` to concatenate to this one.
-
-        Returns
-        -------
-        ret : `Cycler`
-            The concatenated `Cycler`
-        """
-        return concat(self, other)
-
-
-def concat(left, right):
-    """Concatenate two cyclers.
-
-    The keys must match exactly.
-
-    This returns a single Cycler which is equivalent to
-    `itertools.chain(left, right)`
-
-    Examples
-    --------
-
-    >>> num = cycler('a', range(3))
-    >>> let = cycler('a', 'abc')
-    >>> num.concat(let)
-    cycler('a', [0, 1, 2, 'a', 'b', 'c'])
-
-    Parameters
-    ----------
-    left, right : `Cycler`
-        The two `Cycler` instances to concatenate
-
-    Returns
-    -------
-    ret : `Cycler`
-        The concatenated `Cycler`
-    """
-    if left.keys != right.keys:
-        msg = '\n\t'.join(["Keys do not match:",
-                           "Intersection: {both!r}",
-                           "Disjoint: {just_one!r}"]).format(
-                               both=left.keys & right.keys,
-                               just_one=left.keys ^ right.keys)
-
-        raise ValueError(msg)
-
-    _l = left.by_key()
-    _r = right.by_key()
-    return reduce(add, (_cycler(k, _l[k] + _r[k]) for k in left.keys))
-
-
-def cycler(*args, **kwargs):
-    """
-    Create a new `Cycler` object from a single positional argument,
-    a pair of positional arguments, or the combination of keyword arguments.
-
-    cycler(arg)
-    cycler(label1=itr1[, label2=iter2[, ...]])
-    cycler(label, itr)
-
-    Form 1 simply copies a given `Cycler` object.
-
-    Form 2 composes a `Cycler` as an inner product of the
-    pairs of keyword arguments. In other words, all of the
-    iterables are cycled simultaneously, as if through zip().
-
-    Form 3 creates a `Cycler` from a label and an iterable.
-    This is useful for when the label cannot be a keyword argument
-    (e.g., an integer or a name that has a space in it).
-
-    Parameters
-    ----------
-    arg : Cycler
-        Copy constructor for Cycler (does a shallow copy of iterables).
-
-    label : name
-        The property key. In the 2-arg form of the function,
-        the label can be any hashable object. In the keyword argument
-        form of the function, it must be a valid python identifier.
-
-    itr : iterable
-        Finite length iterable of the property values.
-        Can be a single-property `Cycler` that would
-        be like a key change, but as a shallow copy.
-
-    Returns
-    -------
-    cycler : Cycler
-        New `Cycler` for the given property
-
-    """
-    if args and kwargs:
-        raise TypeError("cyl() can only accept positional OR keyword "
-                        "arguments -- not both.")
-
-    if len(args) == 1:
-        if not isinstance(args[0], Cycler):
-            raise TypeError("If only one positional argument given, it must "
-                            " be a Cycler instance.")
-        return Cycler(args[0])
-    elif len(args) == 2:
-        return _cycler(*args)
-    elif len(args) > 2:
-        raise TypeError("Only a single Cycler can be accepted as the lone "
-                        "positional argument. Use keyword arguments instead.")
-
-    if kwargs:
-        return reduce(add, (_cycler(k, v) for k, v in six.iteritems(kwargs)))
-
-    raise TypeError("Must have at least a positional OR keyword arguments")
-
-
-def _cycler(label, itr):
-    """
-    Create a new `Cycler` object from a property name and
-    iterable of values.
-
-    Parameters
-    ----------
-    label : hashable
-        The property key.
-
-    itr : iterable
-        Finite length iterable of the property values.
-
-    Returns
-    -------
-    cycler : Cycler
-        New `Cycler` for the given property
-    """
-    if isinstance(itr, Cycler):
-        keys = itr.keys
-        if len(keys) != 1:
-            msg = "Can not create Cycler from a multi-property Cycler"
-            raise ValueError(msg)
-
-        lab = keys.pop()
-        # Doesn't need to be a new list because
-        # _from_iter() will be creating that new list anyway.
-        itr = (v[lab] for v in itr)
-
-    return Cycler._from_iter(label, itr)

utils/venv/lib/python3.6/site-packages/dateutil/__init__.py

@@ -1,8 +0,0 @@
-# -*- coding: utf-8 -*-
-try:
-    from ._version import version as __version__
-except ImportError:
-    __version__ = 'unknown'
-
-__all__ = ['easter', 'parser', 'relativedelta', 'rrule', 'tz',
-           'utils', 'zoneinfo']

utils/venv/lib/python3.6/site-packages/dateutil/_common.py

@@ -1,43 +0,0 @@
-"""
-Common code used in multiple modules.
-"""
-
-
-class weekday(object):
-    __slots__ = ["weekday", "n"]
-
-    def __init__(self, weekday, n=None):
-        self.weekday = weekday
-        self.n = n
-
-    def __call__(self, n):
-        if n == self.n:
-            return self
-        else:
-            return self.__class__(self.weekday, n)
-
-    def __eq__(self, other):
-        try:
-            if self.weekday != other.weekday or self.n != other.n:
-                return False
-        except AttributeError:
-            return False
-        return True
-
-    def __hash__(self):
-        return hash((
-          self.weekday,
-          self.n,
-        ))
-
-    def __ne__(self, other):
-        return not (self == other)
-
-    def __repr__(self):
-        s = ("MO", "TU", "WE", "TH", "FR", "SA", "SU")[self.weekday]
-        if not self.n:
-            return s
-        else:
-            return "%s(%+d)" % (s, self.n)
-
-# vim:ts=4:sw=4:et

utils/venv/lib/python3.6/site-packages/dateutil/_version.py

@@ -1,4 +0,0 @@
-# coding: utf-8
-# file generated by setuptools_scm
-# don't change, don't track in version control
-version = '2.7.5'

utils/venv/lib/python3.6/site-packages/dateutil/easter.py

@@ -1,89 +0,0 @@
-# -*- coding: utf-8 -*-
-"""
-This module offers a generic easter computing method for any given year, using
-Western, Orthodox or Julian algorithms.
-"""
-
-import datetime
-
-__all__ = ["easter", "EASTER_JULIAN", "EASTER_ORTHODOX", "EASTER_WESTERN"]
-
-EASTER_JULIAN = 1
-EASTER_ORTHODOX = 2
-EASTER_WESTERN = 3
-
-
-def easter(year, method=EASTER_WESTERN):
-    """
-    This method was ported from the work done by GM Arts,
-    on top of the algorithm by Claus Tondering, which was
-    based in part on the algorithm of Ouding (1940), as
-    quoted in "Explanatory Supplement to the Astronomical
-    Almanac", P.  Kenneth Seidelmann, editor.
-
-    This algorithm implements three different easter
-    calculation methods:
-
-    1 - Original calculation in Julian calendar, valid in
-        dates after 326 AD
-    2 - Original method, with date converted to Gregorian
-        calendar, valid in years 1583 to 4099
-    3 - Revised method, in Gregorian calendar, valid in
-        years 1583 to 4099 as well
-
-    These methods are represented by the constants:
-
-    * ``EASTER_JULIAN   = 1``
-    * ``EASTER_ORTHODOX = 2``
-    * ``EASTER_WESTERN  = 3``
-
-    The default method is method 3.
-
-    More about the algorithm may be found at:
-
-    `GM Arts: Easter Algorithms <http://www.gmarts.org/index.php?go=415>`_
-
-    and
-
-    `The Calendar FAQ: Easter <https://www.tondering.dk/claus/cal/easter.php>`_
-
-    """
-
-    if not (1 <= method <= 3):
-        raise ValueError("invalid method")
-
-    # g - Golden year - 1
-    # c - Century
-    # h - (23 - Epact) mod 30
-    # i - Number of days from March 21 to Paschal Full Moon
-    # j - Weekday for PFM (0=Sunday, etc)
-    # p - Number of days from March 21 to Sunday on or before PFM
-    #     (-6 to 28 methods 1 & 3, to 56 for method 2)
-    # e - Extra days to add for method 2 (converting Julian
-    #     date to Gregorian date)
-
-    y = year
-    g = y % 19
-    e = 0
-    if method < 3:
-        # Old method
-        i = (19*g + 15) % 30
-        j = (y + y//4 + i) % 7
-        if method == 2:
-            # Extra dates to convert Julian to Gregorian date
-            e = 10
-            if y > 1600:
-                e = e + y//100 - 16 - (y//100 - 16)//4
-    else:
-        # New method
-        c = y//100
-        h = (c - c//4 - (8*c + 13)//25 + 19*g + 15) % 30
-        i = h - (h//28)*(1 - (h//28)*(29//(h + 1))*((21 - g)//11))
-        j = (y + y//4 + i + 2 - c + c//4) % 7
-
-    # p can be from -6 to 56 corresponding to dates 22 March to 23 May
-    # (later dates apply to method 2, although 23 May never actually occurs)
-    p = i - j + e
-    d = 1 + (p + 27 + (p + 6)//40) % 31
-    m = 3 + (p + 26)//30
-    return datetime.date(int(y), int(m), int(d))

utils/venv/lib/python3.6/site-packages/dateutil/parser/__init__.py

@@ -1,60 +0,0 @@
-# -*- coding: utf-8 -*-
-from ._parser import parse, parser, parserinfo
-from ._parser import DEFAULTPARSER, DEFAULTTZPARSER
-from ._parser import UnknownTimezoneWarning
-
-from ._parser import __doc__
-
-from .isoparser import isoparser, isoparse
-
-__all__ = ['parse', 'parser', 'parserinfo',
-           'isoparse', 'isoparser',
-           'UnknownTimezoneWarning']
-
-
-###
-# Deprecate portions of the private interface so that downstream code that
-# is improperly relying on it is given *some* notice.
-
-
-def __deprecated_private_func(f):
-    from functools import wraps
-    import warnings
-
-    msg = ('{name} is a private function and may break without warning, '
-           'it will be moved and or renamed in future versions.')
-    msg = msg.format(name=f.__name__)
-
-    @wraps(f)
-    def deprecated_func(*args, **kwargs):
-        warnings.warn(msg, DeprecationWarning)
-        return f(*args, **kwargs)
-
-    return deprecated_func
-
-def __deprecate_private_class(c):
-    import warnings
-
-    msg = ('{name} is a private class and may break without warning, '
-           'it will be moved and or renamed in future versions.')
-    msg = msg.format(name=c.__name__)
-
-    class private_class(c):
-        __doc__ = c.__doc__
-
-        def __init__(self, *args, **kwargs):
-            warnings.warn(msg, DeprecationWarning)
-            super(private_class, self).__init__(*args, **kwargs)
-
-    private_class.__name__ = c.__name__
-
-    return private_class
-
-
-from ._parser import _timelex, _resultbase
-from ._parser import _tzparser, _parsetz
-
-_timelex = __deprecate_private_class(_timelex)
-_tzparser = __deprecate_private_class(_tzparser)
-_resultbase = __deprecate_private_class(_resultbase)
-_parsetz = __deprecated_private_func(_parsetz)

utils/venv/lib/python3.6/site-packages/dateutil/parser/isoparser.py

@@ -1,406 +0,0 @@
-# -*- coding: utf-8 -*-
-"""
-This module offers a parser for ISO-8601 strings
-
-It is intended to support all valid date, time and datetime formats per the
-ISO-8601 specification.
-
-..versionadded:: 2.7.0
-"""
-from datetime import datetime, timedelta, time, date
-import calendar
-from dateutil import tz
-
-from functools import wraps
-
-import re
-import six
-
-__all__ = ["isoparse", "isoparser"]
-
-
-def _takes_ascii(f):
-    @wraps(f)
-    def func(self, str_in, *args, **kwargs):
-        # If it's a stream, read the whole thing
-        str_in = getattr(str_in, 'read', lambda: str_in)()
-
-        # If it's unicode, turn it into bytes, since ISO-8601 only covers ASCII
-        if isinstance(str_in, six.text_type):
-            # ASCII is the same in UTF-8
-            try:
-                str_in = str_in.encode('ascii')
-            except UnicodeEncodeError as e:
-                msg = 'ISO-8601 strings should contain only ASCII characters'
-                six.raise_from(ValueError(msg), e)
-
-        return f(self, str_in, *args, **kwargs)
-
-    return func
-
-
-class isoparser(object):
-    def __init__(self, sep=None):
-        """
-        :param sep:
-            A single character that separates date and time portions. If
-            ``None``, the parser will accept any single character.
-            For strict ISO-8601 adherence, pass ``'T'``.
-        """
-        if sep is not None:
-            if (len(sep) != 1 or ord(sep) >= 128 or sep in '0123456789'):
-                raise ValueError('Separator must be a single, non-numeric ' +
-                                 'ASCII character')
-
-            sep = sep.encode('ascii')
-
-        self._sep = sep
-
-    @_takes_ascii
-    def isoparse(self, dt_str):
-        """
-        Parse an ISO-8601 datetime string into a :class:`datetime.datetime`.
-
-        An ISO-8601 datetime string consists of a date portion, followed
-        optionally by a time portion - the date and time portions are separated
-        by a single character separator, which is ``T`` in the official
-        standard. Incomplete date formats (such as ``YYYY-MM``) may *not* be
-        combined with a time portion.
-
-        Supported date formats are:
-
-        Common:
-
-        - ``YYYY``
-        - ``YYYY-MM`` or ``YYYYMM``
-        - ``YYYY-MM-DD`` or ``YYYYMMDD``
-
-        Uncommon:
-
-        - ``YYYY-Www`` or ``YYYYWww`` - ISO week (day defaults to 0)
-        - ``YYYY-Www-D`` or ``YYYYWwwD`` - ISO week and day
-
-        The ISO week and day numbering follows the same logic as
-        :func:`datetime.date.isocalendar`.
-
-        Supported time formats are:
-
-        - ``hh``
-        - ``hh:mm`` or ``hhmm``
-        - ``hh:mm:ss`` or ``hhmmss``
-        - ``hh:mm:ss.sss`` or ``hh:mm:ss.ssssss`` (3-6 sub-second digits)
-
-        Midnight is a special case for `hh`, as the standard supports both
-        00:00 and 24:00 as a representation.
-
-        .. caution::
-
-            Support for fractional components other than seconds is part of the
-            ISO-8601 standard, but is not currently implemented in this parser.
-
-        Supported time zone offset formats are:
-
-        - `Z` (UTC)
-        - `±HH:MM`
-        - `±HHMM`
-        - `±HH`
-
-        Offsets will be represented as :class:`dateutil.tz.tzoffset` objects,
-        with the exception of UTC, which will be represented as
-        :class:`dateutil.tz.tzutc`. Time zone offsets equivalent to UTC (such
-        as `+00:00`) will also be represented as :class:`dateutil.tz.tzutc`.
-
-        :param dt_str:
-            A string or stream containing only an ISO-8601 datetime string
-
-        :return:
-            Returns a :class:`datetime.datetime` representing the string.
-            Unspecified components default to their lowest value.
-
-        .. warning::
-
-            As of version 2.7.0, the strictness of the parser should not be
-            considered a stable part of the contract. Any valid ISO-8601 string
-            that parses correctly with the default settings will continue to
-            parse correctly in future versions, but invalid strings that
-            currently fail (e.g. ``2017-01-01T00:00+00:00:00``) are not
-            guaranteed to continue failing in future versions if they encode
-            a valid date.
-
-        .. versionadded:: 2.7.0
-        """
-        components, pos = self._parse_isodate(dt_str)
-
-        if len(dt_str) > pos:
-            if self._sep is None or dt_str[pos:pos + 1] == self._sep:
-                components += self._parse_isotime(dt_str[pos + 1:])
-            else:
-                raise ValueError('String contains unknown ISO components')
-
-        return datetime(*components)
-
-    @_takes_ascii
-    def parse_isodate(self, datestr):
-        """
-        Parse the date portion of an ISO string.
-
-        :param datestr:
-            The string portion of an ISO string, without a separator
-
-        :return:
-            Returns a :class:`datetime.date` object
-        """
-        components, pos = self._parse_isodate(datestr)
-        if pos < len(datestr):
-            raise ValueError('String contains unknown ISO ' +
-                             'components: {}'.format(datestr))
-        return date(*components)
-
-    @_takes_ascii
-    def parse_isotime(self, timestr):
-        """
-        Parse the time portion of an ISO string.
-
-        :param timestr:
-            The time portion of an ISO string, without a separator
-
-        :return:
-            Returns a :class:`datetime.time` object
-        """
-        return time(*self._parse_isotime(timestr))
-
-    @_takes_ascii
-    def parse_tzstr(self, tzstr, zero_as_utc=True):
-        """
-        Parse a valid ISO time zone string.
-
-        See :func:`isoparser.isoparse` for details on supported formats.
-
-        :param tzstr:
-            A string representing an ISO time zone offset
-
-        :param zero_as_utc:
-            Whether to return :class:`dateutil.tz.tzutc` for zero-offset zones
-
-        :return:
-            Returns :class:`dateutil.tz.tzoffset` for offsets and
-            :class:`dateutil.tz.tzutc` for ``Z`` and (if ``zero_as_utc`` is
-            specified) offsets equivalent to UTC.
-        """
-        return self._parse_tzstr(tzstr, zero_as_utc=zero_as_utc)
-
-    # Constants
-    _MICROSECOND_END_REGEX = re.compile(b'[-+Z]+')
-    _DATE_SEP = b'-'
-    _TIME_SEP = b':'
-    _MICRO_SEP = b'.'
-
-    def _parse_isodate(self, dt_str):
-        try:
-            return self._parse_isodate_common(dt_str)
-        except ValueError:
-            return self._parse_isodate_uncommon(dt_str)
-
-    def _parse_isodate_common(self, dt_str):
-        len_str = len(dt_str)
-        components = [1, 1, 1]
-
-        if len_str < 4:
-            raise ValueError('ISO string too short')
-
-        # Year
-        components[0] = int(dt_str[0:4])
-        pos = 4
-        if pos >= len_str:
-            return components, pos
-
-        has_sep = dt_str[pos:pos + 1] == self._DATE_SEP
-        if has_sep:
-            pos += 1
-
-        # Month
-        if len_str - pos < 2:
-            raise ValueError('Invalid common month')
-
-        components[1] = int(dt_str[pos:pos + 2])
-        pos += 2
-
-        if pos >= len_str:
-            if has_sep:
-                return components, pos
-            else:
-                raise ValueError('Invalid ISO format')
-
-        if has_sep:
-            if dt_str[pos:pos + 1] != self._DATE_SEP:
-                raise ValueError('Invalid separator in ISO string')
-            pos += 1
-
-        # Day
-        if len_str - pos < 2:
-            raise ValueError('Invalid common day')
-        components[2] = int(dt_str[pos:pos + 2])
-        return components, pos + 2
-
-    def _parse_isodate_uncommon(self, dt_str):
-        if len(dt_str) < 4:
-            raise ValueError('ISO string too short')
-
-        # All ISO formats start with the year
-        year = int(dt_str[0:4])
-
-        has_sep = dt_str[4:5] == self._DATE_SEP
-
-        pos = 4 + has_sep       # Skip '-' if it's there
-        if dt_str[pos:pos + 1] == b'W':
-            # YYYY-?Www-?D?
-            pos += 1
-            weekno = int(dt_str[pos:pos + 2])
-            pos += 2
-
-            dayno = 1
-            if len(dt_str) > pos:
-                if (dt_str[pos:pos + 1] == self._DATE_SEP) != has_sep:
-                    raise ValueError('Inconsistent use of dash separator')
-
-                pos += has_sep
-
-                dayno = int(dt_str[pos:pos + 1])
-                pos += 1
-
-            base_date = self._calculate_weekdate(year, weekno, dayno)
-        else:
-            # YYYYDDD or YYYY-DDD
-            if len(dt_str) - pos < 3:
-                raise ValueError('Invalid ordinal day')
-
-            ordinal_day = int(dt_str[pos:pos + 3])
-            pos += 3
-
-            if ordinal_day < 1 or ordinal_day > (365 + calendar.isleap(year)):
-                raise ValueError('Invalid ordinal day' +
-                                 ' {} for year {}'.format(ordinal_day, year))
-
-            base_date = date(year, 1, 1) + timedelta(days=ordinal_day - 1)
-
-        components = [base_date.year, base_date.month, base_date.day]
-        return components, pos
-
-    def _calculate_weekdate(self, year, week, day):
-        """
-        Calculate the day of corresponding to the ISO year-week-day calendar.
-
-        This function is effectively the inverse of
-        :func:`datetime.date.isocalendar`.
-
-        :param year:
-            The year in the ISO calendar
-
-        :param week:
-            The week in the ISO calendar - range is [1, 53]
-
-        :param day:
-            The day in the ISO calendar - range is [1 (MON), 7 (SUN)]
-
-        :return:
-            Returns a :class:`datetime.date`
-        """
-        if not 0 < week < 54:
-            raise ValueError('Invalid week: {}'.format(week))
-
-        if not 0 < day < 8:     # Range is 1-7
-            raise ValueError('Invalid weekday: {}'.format(day))
-
-        # Get week 1 for the specific year:
-        jan_4 = date(year, 1, 4)   # Week 1 always has January 4th in it
-        week_1 = jan_4 - timedelta(days=jan_4.isocalendar()[2] - 1)
-
-        # Now add the specific number of weeks and days to get what we want
-        week_offset = (week - 1) * 7 + (day - 1)
-        return week_1 + timedelta(days=week_offset)
-
-    def _parse_isotime(self, timestr):
-        len_str = len(timestr)
-        components = [0, 0, 0, 0, None]
-        pos = 0
-        comp = -1
-
-        if len(timestr) < 2:
-            raise ValueError('ISO time too short')
-
-        has_sep = len_str >= 3 and timestr[2:3] == self._TIME_SEP
-
-        while pos < len_str and comp < 5:
-            comp += 1
-
-            if timestr[pos:pos + 1] in b'-+Z':
-                # Detect time zone boundary
-                components[-1] = self._parse_tzstr(timestr[pos:])
-                pos = len_str
-                break
-
-            if comp < 3:
-                # Hour, minute, second
-                components[comp] = int(timestr[pos:pos + 2])
-                pos += 2
-                if (has_sep and pos < len_str and
-                        timestr[pos:pos + 1] == self._TIME_SEP):
-                    pos += 1
-
-            if comp == 3:
-                # Microsecond
-                if timestr[pos:pos + 1] != self._MICRO_SEP:
-                    continue
-
-                pos += 1
-                us_str = self._MICROSECOND_END_REGEX.split(timestr[pos:pos + 6],
-                                                           1)[0]
-
-                components[comp] = int(us_str) * 10**(6 - len(us_str))
-                pos += len(us_str)
-
-        if pos < len_str:
-            raise ValueError('Unused components in ISO string')
-
-        if components[0] == 24:
-            # Standard supports 00:00 and 24:00 as representations of midnight
-            if any(component != 0 for component in components[1:4]):
-                raise ValueError('Hour may only be 24 at 24:00:00.000')
-            components[0] = 0
-
-        return components
-
-    def _parse_tzstr(self, tzstr, zero_as_utc=True):
-        if tzstr == b'Z':
-            return tz.tzutc()
-
-        if len(tzstr) not in {3, 5, 6}:
-            raise ValueError('Time zone offset must be 1, 3, 5 or 6 characters')
-
-        if tzstr[0:1] == b'-':
-            mult = -1
-        elif tzstr[0:1] == b'+':
-            mult = 1
-        else:
-            raise ValueError('Time zone offset requires sign')
-
-        hours = int(tzstr[1:3])
-        if len(tzstr) == 3:
-            minutes = 0
-        else:
-            minutes = int(tzstr[(4 if tzstr[3:4] == self._TIME_SEP else 3):])
-
-        if zero_as_utc and hours == 0 and minutes == 0:
-            return tz.tzutc()
-        else:
-            if minutes > 59:
-                raise ValueError('Invalid minutes in time zone offset')
-
-            if hours > 23:
-                raise ValueError('Invalid hours in time zone offset')
-
-            return tz.tzoffset(None, mult * (hours * 60 + minutes) * 60)
-
-
-DEFAULT_ISOPARSER = isoparser()
-isoparse = DEFAULT_ISOPARSER.isoparse

utils/venv/lib/python3.6/site-packages/dateutil/relativedelta.py

@@ -1,590 +0,0 @@
-# -*- coding: utf-8 -*-
-import datetime
-import calendar
-
-import operator
-from math import copysign
-
-from six import integer_types
-from warnings import warn
-
-from ._common import weekday
-
-MO, TU, WE, TH, FR, SA, SU = weekdays = tuple(weekday(x) for x in range(7))
-
-__all__ = ["relativedelta", "MO", "TU", "WE", "TH", "FR", "SA", "SU"]
-
-
-class relativedelta(object):
-    """
-    The relativedelta type is based on the specification of the excellent
-    work done by M.-A. Lemburg in his
-    `mx.DateTime <https://www.egenix.com/products/python/mxBase/mxDateTime/>`_ extension.
-    However, notice that this type does *NOT* implement the same algorithm as
-    his work. Do *NOT* expect it to behave like mx.DateTime's counterpart.
-
-    There are two different ways to build a relativedelta instance. The
-    first one is passing it two date/datetime classes::
-
-        relativedelta(datetime1, datetime2)
-
-    The second one is passing it any number of the following keyword arguments::
-
-        relativedelta(arg1=x,arg2=y,arg3=z...)
-
-        year, month, day, hour, minute, second, microsecond:
-            Absolute information (argument is singular); adding or subtracting a
-            relativedelta with absolute information does not perform an arithmetic
-            operation, but rather REPLACES the corresponding value in the
-            original datetime with the value(s) in relativedelta.
-
-        years, months, weeks, days, hours, minutes, seconds, microseconds:
-            Relative information, may be negative (argument is plural); adding
-            or subtracting a relativedelta with relative information performs
-            the corresponding aritmetic operation on the original datetime value
-            with the information in the relativedelta.
-
-        weekday: 
-            One of the weekday instances (MO, TU, etc). These
-            instances may receive a parameter N, specifying the Nth
-            weekday, which could be positive or negative (like MO(+1)
-            or MO(-2). Not specifying it is the same as specifying
-            +1. You can also use an integer, where 0=MO. Notice that
-            if the calculated date is already Monday, for example,
-            using MO(1) or MO(-1) won't change the day.
-
-        leapdays:
-            Will add given days to the date found, if year is a leap
-            year, and the date found is post 28 of february.
-
-        yearday, nlyearday:
-            Set the yearday or the non-leap year day (jump leap days).
-            These are converted to day/month/leapdays information.
-
-    There are relative and absolute forms of the keyword
-    arguments. The plural is relative, and the singular is
-    absolute. For each argument in the order below, the absolute form
-    is applied first (by setting each attribute to that value) and
-    then the relative form (by adding the value to the attribute).
-
-    The order of attributes considered when this relativedelta is
-    added to a datetime is:
-
-    1. Year
-    2. Month
-    3. Day
-    4. Hours
-    5. Minutes
-    6. Seconds
-    7. Microseconds
-
-    Finally, weekday is applied, using the rule described above.
-
-    For example
-
-    >>> dt = datetime(2018, 4, 9, 13, 37, 0)
-    >>> delta = relativedelta(hours=25, day=1, weekday=MO(1))
-    datetime(2018, 4, 2, 14, 37, 0)
-
-    First, the day is set to 1 (the first of the month), then 25 hours
-    are added, to get to the 2nd day and 14th hour, finally the
-    weekday is applied, but since the 2nd is already a Monday there is
-    no effect.
-
-    """
-
-    def __init__(self, dt1=None, dt2=None,
-                 years=0, months=0, days=0, leapdays=0, weeks=0,
-                 hours=0, minutes=0, seconds=0, microseconds=0,
-                 year=None, month=None, day=None, weekday=None,
-                 yearday=None, nlyearday=None,
-                 hour=None, minute=None, second=None, microsecond=None):
-
-        if dt1 and dt2:
-            # datetime is a subclass of date. So both must be date
-            if not (isinstance(dt1, datetime.date) and
-                    isinstance(dt2, datetime.date)):
-                raise TypeError("relativedelta only diffs datetime/date")
-
-            # We allow two dates, or two datetimes, so we coerce them to be
-            # of the same type
-            if (isinstance(dt1, datetime.datetime) !=
-                    isinstance(dt2, datetime.datetime)):
-                if not isinstance(dt1, datetime.datetime):
-                    dt1 = datetime.datetime.fromordinal(dt1.toordinal())
-                elif not isinstance(dt2, datetime.datetime):
-                    dt2 = datetime.datetime.fromordinal(dt2.toordinal())
-
-            self.years = 0
-            self.months = 0
-            self.days = 0
-            self.leapdays = 0
-            self.hours = 0
-            self.minutes = 0
-            self.seconds = 0
-            self.microseconds = 0
-            self.year = None
-            self.month = None
-            self.day = None
-            self.weekday = None
-            self.hour = None
-            self.minute = None
-            self.second = None
-            self.microsecond = None
-            self._has_time = 0
-
-            # Get year / month delta between the two
-            months = (dt1.year - dt2.year) * 12 + (dt1.month - dt2.month)
-            self._set_months(months)
-
-            # Remove the year/month delta so the timedelta is just well-defined
-            # time units (seconds, days and microseconds)
-            dtm = self.__radd__(dt2)
-
-            # If we've overshot our target, make an adjustment
-            if dt1 < dt2:
-                compare = operator.gt
-                increment = 1
-            else:
-                compare = operator.lt
-                increment = -1
-
-            while compare(dt1, dtm):
-                months += increment
-                self._set_months(months)
-                dtm = self.__radd__(dt2)
-
-            # Get the timedelta between the "months-adjusted" date and dt1
-            delta = dt1 - dtm
-            self.seconds = delta.seconds + delta.days * 86400
-            self.microseconds = delta.microseconds
-        else:
-            # Check for non-integer values in integer-only quantities
-            if any(x is not None and x != int(x) for x in (years, months)):
-                raise ValueError("Non-integer years and months are "
-                                 "ambiguous and not currently supported.")
-
-            # Relative information
-            self.years = int(years)
-            self.months = int(months)
-            self.days = days + weeks * 7
-            self.leapdays = leapdays
-            self.hours = hours
-            self.minutes = minutes
-            self.seconds = seconds
-            self.microseconds = microseconds
-
-            # Absolute information
-            self.year = year
-            self.month = month
-            self.day = day
-            self.hour = hour
-            self.minute = minute
-            self.second = second
-            self.microsecond = microsecond
-
-            if any(x is not None and int(x) != x
-                   for x in (year, month, day, hour,
-                             minute, second, microsecond)):
-                # For now we'll deprecate floats - later it'll be an error.
-                warn("Non-integer value passed as absolute information. " +
-                     "This is not a well-defined condition and will raise " +
-                     "errors in future versions.", DeprecationWarning)
-
-            if isinstance(weekday, integer_types):
-                self.weekday = weekdays[weekday]
-            else:
-                self.weekday = weekday
-
-            yday = 0
-            if nlyearday:
-                yday = nlyearday
-            elif yearday:
-                yday = yearday
-                if yearday > 59:
-                    self.leapdays = -1
-            if yday:
-                ydayidx = [31, 59, 90, 120, 151, 181, 212,
-                           243, 273, 304, 334, 366]
-                for idx, ydays in enumerate(ydayidx):
-                    if yday <= ydays:
-                        self.month = idx+1
-                        if idx == 0:
-                            self.day = yday
-                        else:
-                            self.day = yday-ydayidx[idx-1]
-                        break
-                else:
-                    raise ValueError("invalid year day (%d)" % yday)
-
-        self._fix()
-
-    def _fix(self):
-        if abs(self.microseconds) > 999999:
-            s = _sign(self.microseconds)
-            div, mod = divmod(self.microseconds * s, 1000000)
-            self.microseconds = mod * s
-            self.seconds += div * s
-        if abs(self.seconds) > 59:
-            s = _sign(self.seconds)
-            div, mod = divmod(self.seconds * s, 60)
-            self.seconds = mod * s
-            self.minutes += div * s
-        if abs(self.minutes) > 59:
-            s = _sign(self.minutes)
-            div, mod = divmod(self.minutes * s, 60)
-            self.minutes = mod * s
-            self.hours += div * s
-        if abs(self.hours) > 23:
-            s = _sign(self.hours)
-            div, mod = divmod(self.hours * s, 24)
-            self.hours = mod * s
-            self.days += div * s
-        if abs(self.months) > 11:
-            s = _sign(self.months)
-            div, mod = divmod(self.months * s, 12)
-            self.months = mod * s
-            self.years += div * s
-        if (self.hours or self.minutes or self.seconds or self.microseconds
-                or self.hour is not None or self.minute is not None or
-                self.second is not None or self.microsecond is not None):
-            self._has_time = 1
-        else:
-            self._has_time = 0
-
-    @property
-    def weeks(self):
-        return int(self.days / 7.0)
-
-    @weeks.setter
-    def weeks(self, value):
-        self.days = self.days - (self.weeks * 7) + value * 7
-
-    def _set_months(self, months):
-        self.months = months
-        if abs(self.months) > 11:
-            s = _sign(self.months)
-            div, mod = divmod(self.months * s, 12)
-            self.months = mod * s
-            self.years = div * s
-        else:
-            self.years = 0
-
-    def normalized(self):
-        """
-        Return a version of this object represented entirely using integer
-        values for the relative attributes.
-
-        >>> relativedelta(days=1.5, hours=2).normalized()
-        relativedelta(days=1, hours=14)
-
-        :return:
-            Returns a :class:`dateutil.relativedelta.relativedelta` object.
-        """
-        # Cascade remainders down (rounding each to roughly nearest microsecond)
-        days = int(self.days)
-
-        hours_f = round(self.hours + 24 * (self.days - days), 11)
-        hours = int(hours_f)
-
-        minutes_f = round(self.minutes + 60 * (hours_f - hours), 10)
-        minutes = int(minutes_f)
-
-        seconds_f = round(self.seconds + 60 * (minutes_f - minutes), 8)
-        seconds = int(seconds_f)
-
-        microseconds = round(self.microseconds + 1e6 * (seconds_f - seconds))
-
-        # Constructor carries overflow back up with call to _fix()
-        return self.__class__(years=self.years, months=self.months,
-                              days=days, hours=hours, minutes=minutes,
-                              seconds=seconds, microseconds=microseconds,
-                              leapdays=self.leapdays, year=self.year,
-                              month=self.month, day=self.day,
-                              weekday=self.weekday, hour=self.hour,
-                              minute=self.minute, second=self.second,
-                              microsecond=self.microsecond)
-
-    def __add__(self, other):
-        if isinstance(other, relativedelta):
-            return self.__class__(years=other.years + self.years,
-                                 months=other.months + self.months,
-                                 days=other.days + self.days,
-                                 hours=other.hours + self.hours,
-                                 minutes=other.minutes + self.minutes,
-                                 seconds=other.seconds + self.seconds,
-                                 microseconds=(other.microseconds +
-                                               self.microseconds),
-                                 leapdays=other.leapdays or self.leapdays,
-                                 year=(other.year if other.year is not None
-                                       else self.year),
-                                 month=(other.month if other.month is not None
-                                        else self.month),
-                                 day=(other.day if other.day is not None
-                                      else self.day),
-                                 weekday=(other.weekday if other.weekday is not None
-                                          else self.weekday),
-                                 hour=(other.hour if other.hour is not None
-                                       else self.hour),
-                                 minute=(other.minute if other.minute is not None
-                                         else self.minute),
-                                 second=(other.second if other.second is not None
-                                         else self.second),
-                                 microsecond=(other.microsecond if other.microsecond
-                                              is not None else
-                                              self.microsecond))
-        if isinstance(other, datetime.timedelta):
-            return self.__class__(years=self.years,
-                                  months=self.months,
-                                  days=self.days + other.days,
-                                  hours=self.hours,
-                                  minutes=self.minutes,
-                                  seconds=self.seconds + other.seconds,
-                                  microseconds=self.microseconds + other.microseconds,
-                                  leapdays=self.leapdays,
-                                  year=self.year,
-                                  month=self.month,
-                                  day=self.day,
-                                  weekday=self.weekday,
-                                  hour=self.hour,
-                                  minute=self.minute,
-                                  second=self.second,
-                                  microsecond=self.microsecond)
-        if not isinstance(other, datetime.date):
-            return NotImplemented
-        elif self._has_time and not isinstance(other, datetime.datetime):
-            other = datetime.datetime.fromordinal(other.toordinal())
-        year = (self.year or other.year)+self.years
-        month = self.month or other.month
-        if self.months:
-            assert 1 <= abs(self.months) <= 12
-            month += self.months
-            if month > 12:
-                year += 1
-                month -= 12
-            elif month < 1:
-                year -= 1
-                month += 12
-        day = min(calendar.monthrange(year, month)[1],
-                  self.day or other.day)
-        repl = {"year": year, "month": month, "day": day}
-        for attr in ["hour", "minute", "second", "microsecond"]:
-            value = getattr(self, attr)
-            if value is not None:
-                repl[attr] = value
-        days = self.days
-        if self.leapdays and month > 2 and calendar.isleap(year):
-            days += self.leapdays
-        ret = (other.replace(**repl)
-               + datetime.timedelta(days=days,
-                                    hours=self.hours,
-                                    minutes=self.minutes,
-                                    seconds=self.seconds,
-                                    microseconds=self.microseconds))
-        if self.weekday:
-            weekday, nth = self.weekday.weekday, self.weekday.n or 1
-            jumpdays = (abs(nth) - 1) * 7
-            if nth > 0:
-                jumpdays += (7 - ret.weekday() + weekday) % 7
-            else:
-                jumpdays += (ret.weekday() - weekday) % 7
-                jumpdays *= -1
-            ret += datetime.timedelta(days=jumpdays)
-        return ret
-
-    def __radd__(self, other):
-        return self.__add__(other)
-
-    def __rsub__(self, other):
-        return self.__neg__().__radd__(other)
-
-    def __sub__(self, other):
-        if not isinstance(other, relativedelta):
-            return NotImplemented   # In case the other object defines __rsub__
-        return self.__class__(years=self.years - other.years,
-                             months=self.months - other.months,
-                             days=self.days - other.days,
-                             hours=self.hours - other.hours,
-                             minutes=self.minutes - other.minutes,
-                             seconds=self.seconds - other.seconds,
-                             microseconds=self.microseconds - other.microseconds,
-                             leapdays=self.leapdays or other.leapdays,
-                             year=(self.year if self.year is not None
-                                   else other.year),
-                             month=(self.month if self.month is not None else
-                                    other.month),
-                             day=(self.day if self.day is not None else
-                                  other.day),
-                             weekday=(self.weekday if self.weekday is not None else
-                                      other.weekday),
-                             hour=(self.hour if self.hour is not None else
-                                   other.hour),
-                             minute=(self.minute if self.minute is not None else
-                                     other.minute),
-                             second=(self.second if self.second is not None else
-                                     other.second),
-                             microsecond=(self.microsecond if self.microsecond
-                                          is not None else
-                                          other.microsecond))
-
-    def __abs__(self):
-        return self.__class__(years=abs(self.years),
-                              months=abs(self.months),
-                              days=abs(self.days),
-                              hours=abs(self.hours),
-                              minutes=abs(self.minutes),
-                              seconds=abs(self.seconds),
-                              microseconds=abs(self.microseconds),
-                              leapdays=self.leapdays,
-                              year=self.year,
-                              month=self.month,
-                              day=self.day,
-                              weekday=self.weekday,
-                              hour=self.hour,
-                              minute=self.minute,
-                              second=self.second,
-                              microsecond=self.microsecond)
-
-    def __neg__(self):
-        return self.__class__(years=-self.years,
-                             months=-self.months,
-                             days=-self.days,
-                             hours=-self.hours,
-                             minutes=-self.minutes,
-                             seconds=-self.seconds,
-                             microseconds=-self.microseconds,
-                             leapdays=self.leapdays,
-                             year=self.year,
-                             month=self.month,
-                             day=self.day,
-                             weekday=self.weekday,
-                             hour=self.hour,
-                             minute=self.minute,
-                             second=self.second,
-                             microsecond=self.microsecond)
-
-    def __bool__(self):
-        return not (not self.years and
-                    not self.months and
-                    not self.days and
-                    not self.hours and
-                    not self.minutes and
-                    not self.seconds and
-                    not self.microseconds and
-                    not self.leapdays and
-                    self.year is None and
-                    self.month is None and
-                    self.day is None and
-                    self.weekday is None and
-                    self.hour is None and
-                    self.minute is None and
-                    self.second is None and
-                    self.microsecond is None)
-    # Compatibility with Python 2.x
-    __nonzero__ = __bool__
-
-    def __mul__(self, other):
-        try:
-            f = float(other)
-        except TypeError:
-            return NotImplemented
-
-        return self.__class__(years=int(self.years * f),
-                             months=int(self.months * f),
-                             days=int(self.days * f),
-                             hours=int(self.hours * f),
-                             minutes=int(self.minutes * f),
-                             seconds=int(self.seconds * f),
-                             microseconds=int(self.microseconds * f),
-                             leapdays=self.leapdays,
-                             year=self.year,
-                             month=self.month,
-                             day=self.day,
-                             weekday=self.weekday,
-                             hour=self.hour,
-                             minute=self.minute,
-                             second=self.second,
-                             microsecond=self.microsecond)
-
-    __rmul__ = __mul__
-
-    def __eq__(self, other):
-        if not isinstance(other, relativedelta):
-            return NotImplemented
-        if self.weekday or other.weekday:
-            if not self.weekday or not other.weekday:
-                return False
-            if self.weekday.weekday != other.weekday.weekday:
-                return False
-            n1, n2 = self.weekday.n, other.weekday.n
-            if n1 != n2 and not ((not n1 or n1 == 1) and (not n2 or n2 == 1)):
-                return False
-        return (self.years == other.years and
-                self.months == other.months and
-                self.days == other.days and
-                self.hours == other.hours and
-                self.minutes == other.minutes and
-                self.seconds == other.seconds and
-                self.microseconds == other.microseconds and
-                self.leapdays == other.leapdays and
-                self.year == other.year and
-                self.month == other.month and
-                self.day == other.day and
-                self.hour == other.hour and
-                self.minute == other.minute and
-                self.second == other.second and
-                self.microsecond == other.microsecond)
-
-    def __hash__(self):
-        return hash((
-            self.weekday,
-            self.years,
-            self.months,
-            self.days,
-            self.hours,
-            self.minutes,
-            self.seconds,
-            self.microseconds,
-            self.leapdays,
-            self.year,
-            self.month,
-            self.day,
-            self.hour,
-            self.minute,
-            self.second,
-            self.microsecond,
-        ))
-
-    def __ne__(self, other):
-        return not self.__eq__(other)
-
-    def __div__(self, other):
-        try:
-            reciprocal = 1 / float(other)
-        except TypeError:
-            return NotImplemented
-
-        return self.__mul__(reciprocal)
-
-    __truediv__ = __div__
-
-    def __repr__(self):
-        l = []
-        for attr in ["years", "months", "days", "leapdays",
-                     "hours", "minutes", "seconds", "microseconds"]:
-            value = getattr(self, attr)
-            if value:
-                l.append("{attr}={value:+g}".format(attr=attr, value=value))
-        for attr in ["year", "month", "day", "weekday",
-                     "hour", "minute", "second", "microsecond"]:
-            value = getattr(self, attr)
-            if value is not None:
-                l.append("{attr}={value}".format(attr=attr, value=repr(value)))
-        return "{classname}({attrs})".format(classname=self.__class__.__name__,
-                                             attrs=", ".join(l))
-
-
-def _sign(x):
-    return int(copysign(1, x))
-
-# vim:ts=4:sw=4:et

utils/venv/lib/python3.6/site-packages/dateutil/tz/__init__.py

@@ -1,17 +0,0 @@
-# -*- coding: utf-8 -*-
-from .tz import *
-from .tz import __doc__
-
-#: Convenience constant providing a :class:`tzutc()` instance
-#:
-#: .. versionadded:: 2.7.0
-UTC = tzutc()
-
-__all__ = ["tzutc", "tzoffset", "tzlocal", "tzfile", "tzrange",
-           "tzstr", "tzical", "tzwin", "tzwinlocal", "gettz",
-           "enfold", "datetime_ambiguous", "datetime_exists",
-           "resolve_imaginary", "UTC", "DeprecatedTzFormatWarning"]
-
-
-class DeprecatedTzFormatWarning(Warning):
-    """Warning raised when time zones are parsed from deprecated formats."""

utils/venv/lib/python3.6/site-packages/dateutil/tz/_common.py

@@ -1,415 +0,0 @@
-from six import PY3
-
-from functools import wraps
-
-from datetime import datetime, timedelta, tzinfo
-
-
-ZERO = timedelta(0)
-
-__all__ = ['tzname_in_python2', 'enfold']
-
-
-def tzname_in_python2(namefunc):
-    """Change unicode output into bytestrings in Python 2
-
-    tzname() API changed in Python 3. It used to return bytes, but was changed
-    to unicode strings
-    """
-    def adjust_encoding(*args, **kwargs):
-        name = namefunc(*args, **kwargs)
-        if name is not None and not PY3:
-            name = name.encode()
-
-        return name
-
-    return adjust_encoding
-
-
-# The following is adapted from Alexander Belopolsky's tz library
-# https://github.com/abalkin/tz
-if hasattr(datetime, 'fold'):
-    # This is the pre-python 3.6 fold situation
-    def enfold(dt, fold=1):
-        """
-        Provides a unified interface for assigning the ``fold`` attribute to
-        datetimes both before and after the implementation of PEP-495.
-
-        :param fold:
-            The value for the ``fold`` attribute in the returned datetime. This
-            should be either 0 or 1.
-
-        :return:
-            Returns an object for which ``getattr(dt, 'fold', 0)`` returns
-            ``fold`` for all versions of Python. In versions prior to
-            Python 3.6, this is a ``_DatetimeWithFold`` object, which is a
-            subclass of :py:class:`datetime.datetime` with the ``fold``
-            attribute added, if ``fold`` is 1.
-
-        .. versionadded:: 2.6.0
-        """
-        return dt.replace(fold=fold)
-
-else:
-    class _DatetimeWithFold(datetime):
-        """
-        This is a class designed to provide a PEP 495-compliant interface for
-        Python versions before 3.6. It is used only for dates in a fold, so
-        the ``fold`` attribute is fixed at ``1``.
-
-        .. versionadded:: 2.6.0
-        """
-        __slots__ = ()
-
-        def replace(self, *args, **kwargs):
-            """
-            Return a datetime with the same attributes, except for those
-            attributes given new values by whichever keyword arguments are
-            specified. Note that tzinfo=None can be specified to create a naive
-            datetime from an aware datetime with no conversion of date and time
-            data.
-
-            This is reimplemented in ``_DatetimeWithFold`` because pypy3 will
-            return a ``datetime.datetime`` even if ``fold`` is unchanged.
-            """
-            argnames = (
-                'year', 'month', 'day', 'hour', 'minute', 'second',
-                'microsecond', 'tzinfo'
-            )
-
-            for arg, argname in zip(args, argnames):
-                if argname in kwargs:
-                    raise TypeError('Duplicate argument: {}'.format(argname))
-
-                kwargs[argname] = arg
-
-            for argname in argnames:
-                if argname not in kwargs:
-                    kwargs[argname] = getattr(self, argname)
-
-            dt_class = self.__class__ if kwargs.get('fold', 1) else datetime
-
-            return dt_class(**kwargs)
-
-        @property
-        def fold(self):
-            return 1
-
-    def enfold(dt, fold=1):
-        """
-        Provides a unified interface for assigning the ``fold`` attribute to
-        datetimes both before and after the implementation of PEP-495.
-
-        :param fold:
-            The value for the ``fold`` attribute in the returned datetime. This
-            should be either 0 or 1.
-
-        :return:
-            Returns an object for which ``getattr(dt, 'fold', 0)`` returns
-            ``fold`` for all versions of Python. In versions prior to
-            Python 3.6, this is a ``_DatetimeWithFold`` object, which is a
-            subclass of :py:class:`datetime.datetime` with the ``fold``
-            attribute added, if ``fold`` is 1.
-
-        .. versionadded:: 2.6.0
-        """
-        if getattr(dt, 'fold', 0) == fold:
-            return dt
-
-        args = dt.timetuple()[:6]
-        args += (dt.microsecond, dt.tzinfo)
-
-        if fold:
-            return _DatetimeWithFold(*args)
-        else:
-            return datetime(*args)
-
-
-def _validate_fromutc_inputs(f):
-    """
-    The CPython version of ``fromutc`` checks that the input is a ``datetime``
-    object and that ``self`` is attached as its ``tzinfo``.
-    """
-    @wraps(f)
-    def fromutc(self, dt):
-        if not isinstance(dt, datetime):
-            raise TypeError("fromutc() requires a datetime argument")
-        if dt.tzinfo is not self:
-            raise ValueError("dt.tzinfo is not self")
-
-        return f(self, dt)
-
-    return fromutc
-
-
-class _tzinfo(tzinfo):
-    """
-    Base class for all ``dateutil`` ``tzinfo`` objects.
-    """
-
-    def is_ambiguous(self, dt):
-        """
-        Whether or not the "wall time" of a given datetime is ambiguous in this
-        zone.
-
-        :param dt:
-            A :py:class:`datetime.datetime`, naive or time zone aware.
-
-
-        :return:
-            Returns ``True`` if ambiguous, ``False`` otherwise.
-
-        .. versionadded:: 2.6.0
-        """
-
-        dt = dt.replace(tzinfo=self)
-
-        wall_0 = enfold(dt, fold=0)
-        wall_1 = enfold(dt, fold=1)
-
-        same_offset = wall_0.utcoffset() == wall_1.utcoffset()
-        same_dt = wall_0.replace(tzinfo=None) == wall_1.replace(tzinfo=None)
-
-        return same_dt and not same_offset
-
-    def _fold_status(self, dt_utc, dt_wall):
-        """
-        Determine the fold status of a "wall" datetime, given a representation
-        of the same datetime as a (naive) UTC datetime. This is calculated based
-        on the assumption that ``dt.utcoffset() - dt.dst()`` is constant for all
-        datetimes, and that this offset is the actual number of hours separating
-        ``dt_utc`` and ``dt_wall``.
-
-        :param dt_utc:
-            Representation of the datetime as UTC
-
-        :param dt_wall:
-            Representation of the datetime as "wall time". This parameter must
-            either have a `fold` attribute or have a fold-naive
-            :class:`datetime.tzinfo` attached, otherwise the calculation may
-            fail.
-        """
-        if self.is_ambiguous(dt_wall):
-            delta_wall = dt_wall - dt_utc
-            _fold = int(delta_wall == (dt_utc.utcoffset() - dt_utc.dst()))
-        else:
-            _fold = 0
-
-        return _fold
-
-    def _fold(self, dt):
-        return getattr(dt, 'fold', 0)
-
-    def _fromutc(self, dt):
-        """
-        Given a timezone-aware datetime in a given timezone, calculates a
-        timezone-aware datetime in a new timezone.
-
-        Since this is the one time that we *know* we have an unambiguous
-        datetime object, we take this opportunity to determine whether the
-        datetime is ambiguous and in a "fold" state (e.g. if it's the first
-        occurence, chronologically, of the ambiguous datetime).
-
-        :param dt:
-            A timezone-aware :class:`datetime.datetime` object.
-        """
-
-        # Re-implement the algorithm from Python's datetime.py
-        dtoff = dt.utcoffset()
-        if dtoff is None:
-            raise ValueError("fromutc() requires a non-None utcoffset() "
-                             "result")
-
-        # The original datetime.py code assumes that `dst()` defaults to
-        # zero during ambiguous times. PEP 495 inverts this presumption, so
-        # for pre-PEP 495 versions of python, we need to tweak the algorithm.
-        dtdst = dt.dst()
-        if dtdst is None:
-            raise ValueError("fromutc() requires a non-None dst() result")
-        delta = dtoff - dtdst
-
-        dt += delta
-        # Set fold=1 so we can default to being in the fold for
-        # ambiguous dates.
-        dtdst = enfold(dt, fold=1).dst()
-        if dtdst is None:
-            raise ValueError("fromutc(): dt.dst gave inconsistent "
-                             "results; cannot convert")
-        return dt + dtdst
-
-    @_validate_fromutc_inputs
-    def fromutc(self, dt):
-        """
-        Given a timezone-aware datetime in a given timezone, calculates a
-        timezone-aware datetime in a new timezone.
-
-        Since this is the one time that we *know* we have an unambiguous
-        datetime object, we take this opportunity to determine whether the
-        datetime is ambiguous and in a "fold" state (e.g. if it's the first
-        occurance, chronologically, of the ambiguous datetime).
-
-        :param dt:
-            A timezone-aware :class:`datetime.datetime` object.
-        """
-        dt_wall = self._fromutc(dt)
-
-        # Calculate the fold status given the two datetimes.
-        _fold = self._fold_status(dt, dt_wall)
-
-        # Set the default fold value for ambiguous dates
-        return enfold(dt_wall, fold=_fold)
-
-
-class tzrangebase(_tzinfo):
-    """
-    This is an abstract base class for time zones represented by an annual
-    transition into and out of DST. Child classes should implement the following
-    methods:
-
-        * ``__init__(self, *args, **kwargs)``
-        * ``transitions(self, year)`` - this is expected to return a tuple of
-          datetimes representing the DST on and off transitions in standard
-          time.
-
-    A fully initialized ``tzrangebase`` subclass should also provide the
-    following attributes:
-        * ``hasdst``: Boolean whether or not the zone uses DST.
-        * ``_dst_offset`` / ``_std_offset``: :class:`datetime.timedelta` objects
-          representing the respective UTC offsets.
-        * ``_dst_abbr`` / ``_std_abbr``: Strings representing the timezone short
-          abbreviations in DST and STD, respectively.
-        * ``_hasdst``: Whether or not the zone has DST.
-
-    .. versionadded:: 2.6.0
-    """
-    def __init__(self):
-        raise NotImplementedError('tzrangebase is an abstract base class')
-
-    def utcoffset(self, dt):
-        isdst = self._isdst(dt)
-
-        if isdst is None:
-            return None
-        elif isdst:
-            return self._dst_offset
-        else:
-            return self._std_offset
-
-    def dst(self, dt):
-        isdst = self._isdst(dt)
-
-        if isdst is None:
-            return None
-        elif isdst:
-            return self._dst_base_offset
-        else:
-            return ZERO
-
-    @tzname_in_python2
-    def tzname(self, dt):
-        if self._isdst(dt):
-            return self._dst_abbr
-        else:
-            return self._std_abbr
-
-    def fromutc(self, dt):
-        """ Given a datetime in UTC, return local time """
-        if not isinstance(dt, datetime):
-            raise TypeError("fromutc() requires a datetime argument")
-
-        if dt.tzinfo is not self:
-            raise ValueError("dt.tzinfo is not self")
-
-        # Get transitions - if there are none, fixed offset
-        transitions = self.transitions(dt.year)
-        if transitions is None:
-            return dt + self.utcoffset(dt)
-
-        # Get the transition times in UTC
-        dston, dstoff = transitions
-
-        dston -= self._std_offset
-        dstoff -= self._std_offset
-
-        utc_transitions = (dston, dstoff)
-        dt_utc = dt.replace(tzinfo=None)
-
-        isdst = self._naive_isdst(dt_utc, utc_transitions)
-
-        if isdst:
-            dt_wall = dt + self._dst_offset
-        else:
-            dt_wall = dt + self._std_offset
-
-        _fold = int(not isdst and self.is_ambiguous(dt_wall))
-
-        return enfold(dt_wall, fold=_fold)
-
-    def is_ambiguous(self, dt):
-        """
-        Whether or not the "wall time" of a given datetime is ambiguous in this
-        zone.
-
-        :param dt:
-            A :py:class:`datetime.datetime`, naive or time zone aware.
-
-
-        :return:
-            Returns ``True`` if ambiguous, ``False`` otherwise.
-
-        .. versionadded:: 2.6.0
-        """
-        if not self.hasdst:
-            return False
-
-        start, end = self.transitions(dt.year)
-
-        dt = dt.replace(tzinfo=None)
-        return (end <= dt < end + self._dst_base_offset)
-
-    def _isdst(self, dt):
-        if not self.hasdst:
-            return False
-        elif dt is None:
-            return None
-
-        transitions = self.transitions(dt.year)
-
-        if transitions is None:
-            return False
-
-        dt = dt.replace(tzinfo=None)
-
-        isdst = self._naive_isdst(dt, transitions)
-
-        # Handle ambiguous dates
-        if not isdst and self.is_ambiguous(dt):
-            return not self._fold(dt)
-        else:
-            return isdst
-
-    def _naive_isdst(self, dt, transitions):
-        dston, dstoff = transitions
-
-        dt = dt.replace(tzinfo=None)
-
-        if dston < dstoff:
-            isdst = dston <= dt < dstoff
-        else:
-            isdst = not dstoff <= dt < dston
-
-        return isdst
-
-    @property
-    def _dst_base_offset(self):
-        return self._dst_offset - self._std_offset
-
-    __hash__ = None
-
-    def __ne__(self, other):
-        return not (self == other)
-
-    def __repr__(self):
-        return "%s(...)" % self.__class__.__name__
-
-    __reduce__ = object.__reduce__

utils/venv/lib/python3.6/site-packages/dateutil/tz/_factories.py

@@ -1,49 +0,0 @@
-from datetime import timedelta
-
-
-class _TzSingleton(type):
-    def __init__(cls, *args, **kwargs):
-        cls.__instance = None
-        super(_TzSingleton, cls).__init__(*args, **kwargs)
-
-    def __call__(cls):
-        if cls.__instance is None:
-            cls.__instance = super(_TzSingleton, cls).__call__()
-        return cls.__instance
-
-class _TzFactory(type):
-    def instance(cls, *args, **kwargs):
-        """Alternate constructor that returns a fresh instance"""
-        return type.__call__(cls, *args, **kwargs)
-
-
-class _TzOffsetFactory(_TzFactory):
-    def __init__(cls, *args, **kwargs):
-        cls.__instances = {}
-
-    def __call__(cls, name, offset):
-        if isinstance(offset, timedelta):
-            key = (name, offset.total_seconds())
-        else:
-            key = (name, offset)
-
-        instance = cls.__instances.get(key, None)
-        if instance is None:
-            instance = cls.__instances.setdefault(key,
-                                                  cls.instance(name, offset))
-        return instance
-
-
-class _TzStrFactory(_TzFactory):
-    def __init__(cls, *args, **kwargs):
-        cls.__instances = {}
-
-    def __call__(cls, s, posix_offset=False):
-        key = (s, posix_offset)
-        instance = cls.__instances.get(key, None)
-
-        if instance is None:
-            instance = cls.__instances.setdefault(key,
-                cls.instance(s, posix_offset))
-        return instance
-