[issue16543] Use "positional arguments" in PyArg_UnpackTuple

[Chris Jerdonek]

Chris Jerdonek added the comment:

> TypeError: f() missing 1 required positional argument: 'a'

The error message for round(), for example, has a different form:

>>> round()
TypeError: Required argument 'number' (pos 1) not found

It would be good if these had the same form.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue16543>
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