Stefan Behnel added the comment:
I tried the third patch and it works, but when I write this into a docstring:
def func(x, *, y=None):
"""sig=(a,b)"""
then it fails to extract the signature again and returns (a,b) instead.
I also tried putting in some math term as (non-signature) documentation:
def sig(a, b):
"""sig=(a*b)"""
and it raises a ValueError telling me that the signature is invalid.
So, I still think it should prefer a full function interface over the risky
"__text_signature__" quirk whenever it can.
I also think it shouldn't raise an error if the docstring isn't something
that it can parse, but that's not part of this ticket, I guess.
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue17159>
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