Message 415233 - Python tracker

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Author	graingert
Recipients	graingert
Date	2022-03-15.10:32:43
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1647340363.27.0.242980103727.issue47025@roundup.psfhosted.org>
In-reply-to

Content
importing a module with bytes in `sys.path` fails with: File "<frozen importlib._bootstrap_external>", line 182, in _path_isabs TypeError: startswith first arg must be bytes or a tuple of bytes, not str (see reproducer in attached demo.py) however `sys.path` is documented as supporting bytes "Only strings and bytes should be added to sys.path; all other data types are ignored during import." https://docs.python.org/3/library/sys.html?highlight=Only%20strings%20and%20bytes#sys.path bytes are allowed in PathFinder._find_spec https://github.com/python/cpython/blob/2cf7f865f099db11cc6903b334d9c376610313e8/Lib/importlib/_bootstrap_external.py#L1460-L1462 but perhaps they should be ignored or explicitly fsdecoded ? see also: https://bugs.python.org/issue32642 https://github.com/python/importlib_metadata/issues/372#issuecomment-1067799424

importing a module with bytes in `sys.path` fails with:

  File "<frozen importlib._bootstrap_external>", line 182, in _path_isabs
TypeError: startswith first arg must be bytes or a tuple of bytes, not str

(see reproducer in attached demo.py)

however `sys.path` is documented as supporting bytes "Only strings and bytes should be added to sys.path; all other data types are ignored during import." https://docs.python.org/3/library/sys.html?highlight=Only%20strings%20and%20bytes#sys.path

bytes are allowed in PathFinder._find_spec https://github.com/python/cpython/blob/2cf7f865f099db11cc6903b334d9c376610313e8/Lib/importlib/_bootstrap_external.py#L1460-L1462 but perhaps they should be ignored or explicitly fsdecoded ? 


see also:
https://bugs.python.org/issue32642
https://github.com/python/importlib_metadata/issues/372#issuecomment-1067799424

History
Date	User	Action	Args
2022-03-15 10:32:43	graingert	set	recipients: + graingert
2022-03-15 10:32:43	graingert	set	messageid: <1647340363.27.0.242980103727.issue47025@roundup.psfhosted.org>
2022-03-15 10:32:43	graingert	link	issue47025 messages
2022-03-15 10:32:43	graingert	create