That's too late. The parser needs to know whether it's looking at a definition or a call before that - for example, to know whether to parse "args" as a `parame

That's too late. The parser needs to know whether it's looking at a definition or a call before that - for example, to know whether to parse "args" as a `parameters` or an `arglist` [0]. [0] https://docs.python.org/3/reference/grammar.html https://docs.python.org/3/reference/grammar.html