have Arguments return a dict instead of Namespace

freqtrade/main.py

@@ -32,12 +32,12 @@ def main(sysargv: List[str] = None) -> None:
     worker = None
     try:
         arguments = Arguments(sysargv)
-        args: Namespace = arguments.get_parsed_arg()
+        args = arguments.get_parsed_arg()
 
         # A subcommand has been issued.
         # Means if Backtesting or Hyperopt have been called we exit the bot
-        if hasattr(args, 'func'):
-            args.func(args)
+        if 'func' in args:
+            args['func'](args)
             # TODO: fetch return_code as returned by the command function here
             return_code = 0
         else: