Decorator inhibits execution of function if non-None parameter not supplied

[micseydel]

I'm confused. From what you're saying, it sounds like the behavior should vary based on the contents of args, however it's only based on the length of sys.argv, which doesn't make sense to me from your description (partly because sys.argv will be shorter, not contain None).

Could you provide multiple sample cases where this code's behavior is demonstrated? Also, you probably want to pass along **kwargs as well as *args.