[Python-Dev] TypeError: f() missing 1 required positional argument: 'x'

Antoine Pitrou solipsis at pitrou.net
Thu Sep 20 16:49:16 CEST 2012

On Thu, 20 Sep 2012 10:12:04 -0400
Benjamin Peterson <benjamin at python.org> wrote:
> 2012/9/20 Mark Dickinson <dickinsm at gmail.com>:
> > Thoughts?
> I tried to define the error messages in terms of the callee's
> signature. I call the formals that are not variadic, keyword variadic,
> or keyword-only, positional. For example, in
> def f(a, b, c, *args, d):
>      pass
> a, b, and c are positional. Hence the "positional" in error messages.

But since the error message gives the name of the parameter, there
doesn't seem to be a point to add that it's "positional": it can be
trivially deduced from the function signature.



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