Fix scan as default when there are options passed

Previously, if you ran `wifi` by itself, it would run the scan command,
but if you ran `wifi -i wlp3s0`, it would throw an error. This fixes the
argument parsing to default to the scan command even when there are
options passed in.

CHANGES.rst

@@ -7,6 +7,7 @@ Changelog
 
 - Make the wifi command name configurable (#55 - thanks yourealwaysbe)
 - Add a __main__.py so that wifi can be invoked using python -mwifi
+- Fix argument parsing so that scan is the default argument even with options passed
 
 0.3.8
 ^^^^^

wifi/cli.py

@@ -185,20 +185,16 @@ def autocomplete(position, wordlist, subparsers):
 
 def main():
     parser, subparsers = arg_parser()
-
-    if len(sys.argv) == 1:
-        argv = ['scan']
-    else:
-        argv = sys.argv[1:]
-
+    argv = sys.argv[1:]
     args = parser.parse_args(argv)
 
     try:
         if 'WIFI_AUTOCOMPLETE' in os.environ:
             autocomplete(int(os.environ['COMP_CWORD']),
                          os.environ['COMP_WORDS'].split(), subparsers)
         else:
-            args.func(args)
+            command = getattr(args, 'func', scan_command)
+            command(args)
     except (AssertionError, InterfaceError) as e:
         sys.stderr.write("Error: ")
         sys.exit(e)