[issue39942] Making instance of `TypeVar` fails because of missing `__name__`

[Ivan Levkivskyi]

Change by Ivan Levkivskyi :


--
resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed

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[issue39942] Making instance of `TypeVar` fails because of missing `__name__`

[miss-islington]

miss-islington  added the comment:


New changeset 41660cac63c1a216e43335007e329e213054100e by Miss Islington (bot) 
in branch '3.8':
bpo-39942:Fix failure in `TypeVar` when missing `__name__` (GH-19616)
https://github.com/python/cpython/commit/41660cac63c1a216e43335007e329e213054100e


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[issue39942] Making instance of `TypeVar` fails because of missing `__name__`

[miss-islington]

miss-islington  added the comment:


New changeset 694a95ff437613e6295f531336b5bc7cab9e3713 by Miss Islington (bot) 
in branch '3.7':
bpo-39942:Fix failure in `TypeVar` when missing `__name__` (GH-19616)
https://github.com/python/cpython/commit/694a95ff437613e6295f531336b5bc7cab9e3713


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[issue39942] Making instance of `TypeVar` fails because of missing `__name__`

[miss-islington]

Change by miss-islington :


--
nosy: +miss-islington
nosy_count: 3.0 -> 4.0
pull_requests: +18954
pull_request: https://github.com/python/cpython/pull/19626

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[issue39942] Making instance of `TypeVar` fails because of missing `__name__`

[miss-islington]

Change by miss-islington :


--
pull_requests: +18955
pull_request: https://github.com/python/cpython/pull/19627

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[issue39942] Making instance of `TypeVar` fails because of missing `__name__`

[Ivan Levkivskyi]

Ivan Levkivskyi  added the comment:


New changeset a25a04fea5446b1712cde0cff556574be139285a by HongWeipeng in branch 
'master':
bpo-39942:Fix failure in `TypeVar` when missing `__name__` (GH-19616)
https://github.com/python/cpython/commit/a25a04fea5446b1712cde0cff556574be139285a


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nosy: +levkivskyi

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[issue39942] Making instance of `TypeVar` fails because of missing `__name__`

[hongweipeng]

Change by hongweipeng :


--
keywords: +patch
nosy: +hongweipeng
nosy_count: 1.0 -> 2.0
pull_requests: +18948
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/19616

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[issue39942] Making instance of `TypeVar` fails because of missing `__name__`

[jack1142]

New submission from jack1142 :

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

Traceback:
```
Traceback (most recent call last):
  File "", line 1, in 
  File "", line 3, in 
  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()`

--
components: Library (Lib)
messages: 363990
nosy: jack1142
priority: normal
severity: normal
status: open
title: Making instance of `TypeVar` fails because of missing `__name__`
type: behavior
versions: Python 3.7, Python 3.8, Python 3.9

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