added a flask venv

2019-01-19 13:23:37 +01:00
parent cbd3a55746
commit a1a8bca34b
961 changed files with 129021 additions and 0 deletions
@@ -0,0 +1,55 @@
+# coding: utf-8
+#
+#  Copyright © 2010—2014 Andrey Mikhaylenko and contributors
+#
+#  This file is part of Argh.
+#
+#  Argh is free software under terms of the GNU Lesser
+#  General Public License version 3 (LGPLv3) as published by the Free
+#  Software Foundation. See the file README.rst for copying conditions.
+#
+"""
+Utilities
+~~~~~~~~~
+"""
+import argparse
+import inspect
+
+from argh import compat
+
+
+def get_subparsers(parser, create=False):
+    """
+    Returns the :class:`argparse._SubParsersAction` instance for given
+    :class:`ArgumentParser` instance as would have been returned by
+    :meth:`ArgumentParser.add_subparsers`. The problem with the latter is that
+    it only works once and raises an exception on the second attempt, and the
+    public API seems to lack a method to get *existing* subparsers.
+
+    :param create:
+        If `True`, creates the subparser if it does not exist. Default if
+        `False`.
+
+    """
+    # note that ArgumentParser._subparsers is *not* what is returned by
+    # ArgumentParser.add_subparsers().
+    if parser._subparsers:
+        actions = [a for a in parser._actions
+                   if isinstance(a, argparse._SubParsersAction)]
+        assert len(actions) == 1
+        return actions[0]
+    else:
+        if create:
+            return parser.add_subparsers()
+
+
+def get_arg_spec(function):
+    """
+    Returns argument specification for given function.  Omits special
+    arguments of instance methods (`self`) and static methods (usually `cls`
+    or something like this).
+    """
+    spec = compat.getargspec(function)
+    if inspect.ismethod(function):
+        spec = spec._replace(args=spec.args[1:])
+    return spec