[issue25830] _TypeAlias: Discrepancy between docstring and behavior

2016-09-27 Thread Guido van Rossum 

Guido van Rossum added the comment:

Fixed by 09cc43df4509.

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resolution:  -> fixed
status: open -> closed

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[issue25830] _TypeAlias: Discrepancy between docstring and behavior

2016-06-30 Thread Ivan Levkivskyi 

Changes by Ivan Levkivskyi :


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nosy: +levkivskyi

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[issue25830] _TypeAlias: Discrepancy between docstring and behavior

2016-01-21 Thread Guido van Rossum 

Guido van Rossum added the comment:

Actually isinstance() shouldn't be supported by most things in typing.py
(except for those that mimic existing collection ABCs). Even issubclass()
should be taken out according to the BDFL-delegate for PEP 484. See
https://github.com/ambv/typehinting/issues/136

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[issue25830] _TypeAlias: Discrepancy between docstring and behavior

2016-01-21 Thread Berker Peksag 

Berker Peksag added the comment:

Looks like the docstring is a bit misleading. ``isinstance(m, Match)`` behavior 
is already tested in the test suite: 
https://hg.python.org/cpython/file/default/Lib/test/test_typing.py#l1297

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nosy: +berker.peksag, gvanrossum

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[issue25830] _TypeAlias: Discrepancy between docstring and behavior

2015-12-09 Thread flying sheep 

New submission from flying sheep:

_TypeAlias claims in its docstring that “It can be used in instance and 
subclass checks”, yet promptly contradicts itself if you try it: “Type aliases 
cannot be used with isinstance().”

it would be useful to either document (and therefore bless) type_impl, or make 
it actually work with isinstance (probably by delegating to type_impl)

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components: Library (Lib)
messages: 256154
nosy: flying sheep
priority: normal
severity: normal
status: open
title: _TypeAlias: Discrepancy between docstring and behavior
type: behavior
versions: Python 3.5, Python 3.6

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