Improve None as predicate for Python 2 ifilter #8191
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Thanks! Unfortunately, I know very little about Python 2, so I won't be able to review this (though one of the other maintainers might). Please be aware, however, that we're planning on deleting all of our remaining Python 2 stubs as soon as mypy drops support for Python 2, which could be very soon (#7367, python/mypy#12237) |
srittau
requested changes
Jun 28, 2022
stdlib/@python2/itertools.pyi
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| @overload | ||
| def ifilter(predicate: Callable[[_T], Any], iterable: Iterable[_T]) -> Iterator[_T]: ... | ||
| @overload | ||
| def ifilterfalse(predicate: None, iterable: Iterable[_T | None]) -> Iterator[_T]: ... |
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I don't think this is correct. Using Python 3:
>>> from itertools import filterfalse
>>> list(filterfalse(None, [0,1,2,3,None]))
[0, None]I don't think an overload for ifilterfalse makes sense here.
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According to mypy_primer, this change has no effect on the checked open source code. 🤖🎉 |
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@AlexWaygood thanks for the heads-up, I was expecting something like this 😬 @srittau I removed the |
srittau
approved these changes
Jun 28, 2022
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Properly support
ifilter(None, ...)on Python 2. Used Python 3filteras a basis.I stumbled over this as
six.moves.filterreturnsitertools.ifilter.