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Issue18853

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classification
Title:Got ResourceWarning unclosed file when running Lib/shlex.py demo
Type:resource usageStage:resolved
Components:Library (Lib)Versions:Python 3.4, Python 3.5, Python 2.7
process
Status:closedResolution:fixed
Dependencies:Superseder:
Assigned To:Nosy List: Claudiu.Popa, ezio.melotti, madison.may, python-dev, r.david.murray, terry.reedy, vajrasky
Priority:normalKeywords:patch

Created on2013-08-27 14:04 byvajrasky, last changed2022-04-11 14:57 byadmin. This issue is nowclosed.

Files
File nameUploadedDescriptionEdit
fix_resource_warning_shlex_test.patchvajrasky,2013-08-27 14:04review
Messages (6)
msg196291 -(view)Author: Vajrasky Kok (vajrasky)*Date: 2013-08-27 14:04
The python is compiled with --with-pydebug flag.[sky@localhost cpython]$ cat /tmp/quote.txt manly "man" likes 'cute "cat"'[sky@localhost cpython]$ ./pythonLib/shlex.py /tmp/quote.txt Token: 'manly'Token: '"man"'Token: 'likes'Token: '\'cute "cat"\''sys:1: ResourceWarning: unclosed file <_io.TextIOWrapper name='/tmp/quote.txt' mode='r' encoding='UTF-8'>Attached the patch to close the file when running the demo.
msg196583 -(view)Author: Terry J. Reedy (terry.reedy)*(Python committer)Date: 2013-08-30 21:55
I think the warning should be silenced on all versions where it occurs. There is no real problem here, but there can be with multiple opens without close on non-refcounted interpreters. Patch looks good but I have not tried it.
msg196585 -(view)Author: Madison May (madison.may)*Date: 2013-08-30 21:58
The patch LGTM as well.ResourceWarning was silenced after applying patch when tested on my machine.
msg221540 -(view)Author: PCManticore (Claudiu.Popa)*(Python triager)Date: 2014-06-25 10:25
It seems commit ready.
msg229622 -(view)Author: Roundup Robot (python-dev)(Python triager)Date: 2014-10-18 00:30
New changeset4c2b77d0680b by R David Murray in branch '3.4':#18853: Fix resource warning in shlex's __main__ section.https://hg.python.org/cpython/rev/4c2b77d0680bNew changeset8ed630f28753 by R David Murray in branch 'default':Merge:#18853: Fix resource warning in shlex's __main__ section.https://hg.python.org/cpython/rev/8ed630f28753
msg229623 -(view)Author: R. David Murray (r.david.murray)*(Python committer)Date: 2014-10-18 00:34
Thanks for the patch, Vajrasky, but I chose a different fix, since the proposed one could leave the file open if the shlex constructor raised an error.  Not particularly important, but as long as we are cleaning up the code we might as well make it as clean as we can.Since 2.7 doesn't generate ResourceWarnings I chose not to apply it there.
History
DateUserActionArgs
2022-04-11 14:57:50adminsetgithub: 63053
2014-10-18 00:34:52r.david.murraysetstatus: open -> closed

nosy: +r.david.murray
messages: +msg229623

resolution: fixed
stage: commit review -> resolved
2014-10-18 00:30:28python-devsetnosy: +python-dev
messages: +msg229622
2014-06-27 03:46:48ezio.melottisetversions: - Python 3.3
2014-06-25 10:25:04Claudiu.Popasetversions: + Python 3.5
nosy: +Claudiu.Popa

messages: +msg221540

stage: patch review -> commit review
2013-09-04 19:07:22ezio.melottisetnosy: +ezio.melotti
2013-08-30 21:58:57madison.maysetnosy: +madison.may
messages: +msg196585
2013-08-30 21:55:35terry.reedysetversions: + Python 2.7, Python 3.3
nosy: +terry.reedy

messages: +msg196583

stage: patch review
2013-08-27 14:04:27vajraskycreate
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