Yury Selivanov added the comment:
@Nick:
Ouch... I'm halfway through the implementation, and it seems like your idea
isn't going to work.
Example (from unittest):
def foo(a=1, b=2, c=3): pass
_foo = partial(foo, a=10, c=13)
Now, the signature for "_foo", with your logic applied, will be:
(b=2, *, a=10, c=13)
If, however, you try to do the following call:
_foo(11)
It will fail with a TypeError "got multiple values for argument 'a'", because
'partial' will actually do this call:
foo(11, a=10, c=13)
I now remember this obstacle, that's why I have '_partial_kwarg'. So
unfortunately, why I really like your idea, I don't think we can make it work.
Now, I still want to get rid the '_partial_kwarg' attribute. Are you guys OK,
if I introduce PartialParameter & PartialSignature classes?
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue21117>
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