Static code analysis and corrections

main.py

@@ -0,0 +1,21 @@
+#main.py - the main program file of the TeraHz project
+#This code is licensed under 3-clause BSD licensed
+import serial as ser
+
+#global config
+# TODO: move this to another file
+uartpath = '/dev/ttyUSB0'
+uartbaud = 115200
+uarttout = 5
+
+print('TeraHz project')
+print('Accessing the serial port')
+
+sp =  'blank'
+
+try:
+    sp = ser.Serial(uartpath, uartbaud, timeout=uarttout)
+except Exception as e:
+    print('Connection to serial port at {} failed!'.format(uartpath))
+    raise e
+    exit()