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contextlib.nullcontext doesn't work with async context managers #85715

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tomgrin10 mannequin opened this issue Aug 13, 2020 · 4 comments
Closed

contextlib.nullcontext doesn't work with async context managers #85715

tomgrin10 mannequin opened this issue Aug 13, 2020 · 4 comments
Labels
3.10 only security fixes stdlib Python modules in the Lib dir topic-asyncio type-feature A feature request or enhancement

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@tomgrin10
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tomgrin10 mannequin commented Aug 13, 2020

BPO 41543
Nosy @njsmith, @asvetlov, @1st1, @tomgrin10
PRs
  • bpo-41543: contextlib.nullcontext can fill in for an async context manager #21870
    		•

    Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.

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    GitHub fields:

    assignee = None
closed_at = <Date 2020-11-09.13:24:59.262>
created_at = <Date 2020-08-13.20:58:48.583>
labels = ['type-feature', 'library', '3.10', 'expert-asyncio']
title = "contextlib.nullcontext doesn't work with async context managers"
updated_at = <Date 2020-11-09.13:24:59.261>
user = 'https://github.com/tomgrin10'

    bugs.python.org fields:

    activity = <Date 2020-11-09.13:24:59.261>
actor = 'asvetlov'
assignee = 'none'
closed = True
closed_date = <Date 2020-11-09.13:24:59.262>
closer = 'asvetlov'
components = ['Library (Lib)', 'asyncio']
creation = <Date 2020-08-13.20:58:48.583>
creator = 'tomgrin10'
dependencies = []
files = []
hgrepos = []
issue_num = 41543
keywords = ['patch']
message_count = 4.0
messages = ['375346', '375351', '375357', '380582']
nosy_count = 4.0
nosy_names = ['njs', 'asvetlov', 'yselivanov', 'tomgrin10']
pr_nums = ['21870']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue41543'
versions = ['Python 3.10']
    @tomgrin10
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    tomgrin10 mannequin commented Aug 13, 2020

    contextlib.nullcontext cannot be used with async conetext managers, because it implements only __enter__ and __exit__, and doesn't implement __aenter__ and __aexit__.

    @tomgrin10 tomgrin10 mannequin added stdlib Python modules in the Lib dir topic-asyncio type-feature A feature request or enhancement labels Aug 13, 2020
    @1st1
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    1st1 commented Aug 13, 2020

    I typically don't like objects that support both with and async with, but in this case I think that's appropriate. Nathaniel, Andrew, what do you think?

    @njsmith
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    njsmith commented Aug 13, 2020

    It does seem pretty harmless in this case.

    @asvetlov
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    asvetlov commented Nov 9, 2020

    New changeset a117167 by Tom Gringauz in branch 'master':
    bpo-41543: contextlib.nullcontext can fill in for an async context manager (GH-21870)
    a117167

    @asvetlov asvetlov added the 3.10 only security fixes label Nov 9, 2020
    @asvetlov asvetlov closed this as completed Nov 9, 2020
    @asvetlov asvetlov added the 3.10 only security fixes label Nov 9, 2020
    @asvetlov asvetlov closed this as completed Nov 9, 2020
    @ezio-melotti ezio-melotti transferred this issue from another repository Apr 10, 2022
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