[issue32852] trace changes sys.argv from list to tuple

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

Thank you for your contribution Kyle.

Usually backports a made after merging the original PR. Thanks to bots this is 
done in half-automatical way.

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

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[issue32852] trace changes sys.argv from list to tuple

[miss-islington]

miss-islington  added the comment:


New changeset dda938683c48197ab7e775144136f433a5d43103 by Miss Islington (bot) 
in branch '3.6':
bpo-32852: Fix trace changing sys.argv to tuple. (GH-5692)
https://github.com/python/cpython/commit/dda938683c48197ab7e775144136f433a5d43103


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[issue32852] trace changes sys.argv from list to tuple

[miss-islington]

miss-islington  added the comment:


New changeset afb5e5583694798793d44f35f901aa912ece278a by Miss Islington (bot) 
in branch '3.7':
bpo-32852: Fix trace changing sys.argv to tuple. (GH-5692)
https://github.com/python/cpython/commit/afb5e5583694798793d44f35f901aa912ece278a


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[issue32852] trace changes sys.argv from list to tuple

[miss-islington]

Change by miss-islington :


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[issue32852] trace changes sys.argv from list to tuple

[miss-islington]

Change by miss-islington :


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[issue32852] trace changes sys.argv from list to tuple

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:


New changeset 9f4223261fd129ad7b9a09b2b0d625d1bb90b22b by Serhiy Storchaka 
(Kyle Altendorf) in branch 'master':
bpo-32852: Fix trace changing sys.argv to tuple. (GH-5692)
https://github.com/python/cpython/commit/9f4223261fd129ad7b9a09b2b0d625d1bb90b22b


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[issue32852] trace changes sys.argv from list to tuple

[Kyle Altendorf]

Change by Kyle Altendorf :


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[issue32852] trace changes sys.argv from list to tuple

[Kyle Altendorf]

Change by Kyle Altendorf :


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[issue32852] trace changes sys.argv from list to tuple

[Kyle Altendorf]

Change by Kyle Altendorf :


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[issue32852] trace changes sys.argv from list to tuple

[Kyle Altendorf]

Change by Kyle Altendorf :


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[issue32852] trace changes sys.argv from list to tuple

[Kyle Altendorf]

Change by Kyle Altendorf :


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[issue32852] trace changes sys.argv from list to tuple

[Kyle Altendorf]

Change by Kyle Altendorf :


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[issue32852] trace changes sys.argv from list to tuple

[Kyle Altendorf via Python-bugs-list]

New submission from Kyle Altendorf :

Normally sys.argv is a list but when using the trace module sys.argv gets 
changed to a tuple.  In my case this caused an issue with running an entry 
point due to the line:

  sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])

When researching I found:
  
https://stackoverflow.com/questions/47688568/trace-sys-argv-args-typeerror-tuple-object-does-not-support-item-assig

They point out where trace assigns a tuple to sys.argv.
  https://github.com/python/cpython/blob/master/Lib/trace.py#L708


I'll see what I can do to put together a quick patch.


$ cat t.py
import sys

print(sys.version)

print(type(sys.argv))
$ /home/altendky/.pyenv/versions/3.7.0a2/bin/python t.py
3.7.0a2 (default, Feb 15 2018, 11:20:36) 
[GCC 6.3.0 20170516]

$ /home/altendky/.pyenv/versions/3.7.0a2/bin/python -m trace --trace t.py
 --- modulename: t, funcname: 
t.py(1): import sys
t.py(3): print(sys.version)
3.7.0a2 (default, Feb 15 2018, 11:20:36) 
[GCC 6.3.0 20170516]
t.py(5): print(type(sys.argv))

 --- modulename: trace, funcname: _unsettrace
trace.py(71): sys.settrace(None)

--
components: Library (Lib)
messages: 312213
nosy: altendky
priority: normal
severity: normal
status: open
title: trace changes sys.argv from list to tuple
versions: Python 3.6, Python 3.7

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