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Making instance of TypeVar fails because of missing __name__ #84123

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jack1142 mannequin opened this issue Mar 12, 2020 · 4 comments
Closed

Making instance of TypeVar fails because of missing __name__ #84123

jack1142 mannequin opened this issue Mar 12, 2020 · 4 comments
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3.7 (EOL) end of life 3.8 only security fixes 3.9 only security fixes stdlib Python modules in the Lib dir type-bug An unexpected behavior, bug, or error

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@jack1142
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jack1142 mannequin commented Mar 12, 2020

BPO 39942
Nosy @ilevkivskyi, @hongweipeng, @miss-islington, @jack1142
PRs
  • bpo-39942:Fix TypeVar fails when missing __name__ #19616
  • [3.7] bpo-39942:Fix failure in TypeVar when missing __name__ (GH-19616) #19626
  • [3.8] bpo-39942:Fix failure in TypeVar when missing __name__ (GH-19616) #19627
    		•

    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 2020-04-20.20:28:52.865>
created_at = <Date 2020-03-12.00:11:51.865>
labels = ['3.7', '3.8', 'type-bug', 'library', '3.9']
title = 'Making instance of `TypeVar` fails because of missing `__name__`'
updated_at = <Date 2020-04-20.20:28:52.865>
user = 'https://github.com/jack1142'

    bugs.python.org fields:

    activity = <Date 2020-04-20.20:28:52.865>
actor = 'levkivskyi'
assignee = 'none'
closed = True
closed_date = <Date 2020-04-20.20:28:52.865>
closer = 'levkivskyi'
components = ['Library (Lib)']
creation = <Date 2020-03-12.00:11:51.865>
creator = 'jack1142'
dependencies = []
files = []
hgrepos = []
issue_num = 39942
keywords = ['patch']
message_count = 4.0
messages = ['363990', '366872', '366874', '366876']
nosy_count = 4.0
nosy_names = ['levkivskyi', 'hongweipeng', 'miss-islington', 'jack1142']
pr_nums = ['19616', '19626', '19627']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue39942'
versions = ['Python 3.7', 'Python 3.8', 'Python 3.9']
    @jack1142
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    jack1142 mannequin commented Mar 12, 2020

    Example code:

    code = """
import typing
T = typing.TypeVar("T")
"""
exec(code, {})

    Traceback:

    Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<string>", line 3, in <module>
  File "C:\Python38\lib\typing.py", line 603, in __init__
    def_mod = sys._getframe(1).f_globals['__name__']  # for pickling
KeyError: '__name__'

    If this problem with __name__ is not something that needs to be fixed, then I also noticed that the same line in typing.py will also raise when platform doesn't have sys._getframe()

    @jack1142 jack1142 mannequin added 3.7 (EOL) end of life 3.8 only security fixes 3.9 only security fixes stdlib Python modules in the Lib dir type-bug An unexpected behavior, bug, or error labels Mar 12, 2020
    @ilevkivskyi
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    New changeset a25a04f by HongWeipeng in branch 'master':
    bpo-39942:Fix failure in TypeVar when missing __name__ (GH-19616)
    a25a04f

    @miss-islington
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    New changeset 694a95f by Miss Islington (bot) in branch '3.7':
    bpo-39942:Fix failure in TypeVar when missing __name__ (GH-19616)
    694a95f

    @miss-islington
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    New changeset 41660ca by Miss Islington (bot) in branch '3.8':
    bpo-39942:Fix failure in TypeVar when missing __name__ (GH-19616)
    41660ca

    @ezio-melotti ezio-melotti transferred this issue from another repository Apr 10, 2022
    @JelleZijlstra JelleZijlstra mentioned this issue May 21, 2023
    Merged
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