New submission from dwich <[email protected]>:
On Windows tempfile.TemporaryFile() accepts delete attribute. On Linux
TemporaryFile() raises TypeError if delete attribute is used.
In tempfile.py source is the code below which means that on Windows
TemporaryFile behaves like NamedTemporaryFile. I suppose the code should not be
changed but the behaviour should be mentioned in documentation.
if _os.name != 'posix' or _os.sys.platform == 'cygwin':
# On non-POSIX and Cygwin systems, assume that we cannot unlink a file
# while it is open.
TemporaryFile = NamedTemporaryFile
Steps to reproduce:
>>> import tempfile
>>> tf = tempfile.TemporaryFile(delete=False)
On Linux Python throws TypeError:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: TemporaryFile() got an unexpected keyword argument 'delete'
On Windows Python does not throw TypeError because on Windows TemporaryFile is
in fact NamedTemporaryFile which accepts delete attribute.
Tested on all these versions: 3.7.0 64 bit, 3.6.5 32 bit, 3.5.4 32 bit, 3.4.4
32 bit, 2.7.15 32 bit
Proposed text to tempfile.TemporaryFile documentation:
On non POSIX or Cygwin platforms TemporaryFile behaves exacly like
NamedTemporaryFile including the fact that TemporaryFile accepts delete
attribute and does not raise
TypeError: TemporaryFile() got an unexpected keyword argument 'delete'.
----------
assignee: docs@python
components: Documentation
messages: 323702
nosy: docs@python, dwich
priority: normal
severity: normal
status: open
title: On Windows tempfile.TemporaryFile behaves like NamedTemporaryFile
versions: Python 2.7, Python 3.4, Python 3.5, Python 3.6, Python 3.7
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<https://bugs.python.org/issue34429>
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