New submission from Eric L. <[email protected]>:
tempfile fails on mixed str and bytes when setting tempfile.tempdir to a
non-existent bytes path but succeeds when set to an existing bytes path.
$ python3.9
Python 3.9.0a6 (default, Apr 28 2020, 00:00:00)
[GCC 10.0.1 20200430 (Red Hat 10.0.1-0.14)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import tempfile
>>> tempfile.tempdir = b'/doesntexist'
>>> tempfile.TemporaryFile()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib64/python3.9/tempfile.py", line 615, in TemporaryFile
(fd, name) = _mkstemp_inner(dir, prefix, suffix, flags, output_type)
File "/usr/lib64/python3.9/tempfile.py", line 248, in _mkstemp_inner
file = _os.path.join(dir, pre + name + suf)
File "/usr/lib64/python3.9/posixpath.py", line 90, in join
genericpath._check_arg_types('join', a, *p)
File "/usr/lib64/python3.9/genericpath.py", line 155, in _check_arg_types
raise TypeError("Can't mix strings and bytes in path components") from None
TypeError: Can't mix strings and bytes in path components
>>> tempfile.tempdir = b'/tmp'
>>> tempfile.TemporaryFile()
<_io.BufferedRandom name=3>
>>> tempfile.mktemp()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib64/python3.9/tempfile.py", line 400, in mktemp
file = _os.path.join(dir, prefix + name + suffix)
File "/usr/lib64/python3.9/posixpath.py", line 90, in join
genericpath._check_arg_types('join', a, *p)
File "/usr/lib64/python3.9/genericpath.py", line 155, in _check_arg_types
raise TypeError("Can't mix strings and bytes in path components") from None
TypeError: Can't mix strings and bytes in path components
It seems to me that the case of `tempfile.tempdir` being of type bytes hasn't
been completely considered and is handled inconsistently. My suggestion would
be to manage the paths as bytes if there is no other indication like suffix or
prefix.
----------
messages: 369469
nosy: ericzolf
priority: normal
severity: normal
status: open
title: tempfile mixes str and bytes in an inconsistent manner
type: behavior
versions: Python 3.5, Python 3.6, Python 3.7, Python 3.8, Python 3.9
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Python tracker <[email protected]>
<https://bugs.python.org/issue40701>
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