Message 293248 - Python tracker

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Author	dhess
Recipients	a.badger, barry, dhess, l0nwlf, pitrou, r.david.murray, siona, sivert, terry.reedy, wichert, wodny
Date	2017-05-08.19:15:23
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1494270923.69.0.965088456423.issue4963@psf.upfronthosting.co.za>
In-reply-to

Content
Concur with @sivert – the result of guess_extension() is non-deterministic between mimetypes module initialization. $ python Python 3.4.3 (default, Nov 17 2016, 01:08:31) [GCC 4.8.4] on linux Type "help", "copyright", "credits" or "license" for more information. >>> $ python -c 'import mimetypes;print(mimetypes.guess_extension("image/jpeg"))' .jpe $ python -c 'import mimetypes;print(mimetypes.guess_extension("image/jpeg"))' .jpe $ python -c 'import mimetypes;print(mimetypes.guess_extension("image/jpeg"))' .jpe $ python -c 'import mimetypes;print(mimetypes.guess_extension("image/jpeg"))' .jpeg $ python -c 'import mimetypes;print(mimetypes.guess_extension("image/jpeg"))' .jpeg $ python -c 'import mimetypes;print(mimetypes.guess_extension("image/jpeg"))' .jpe $ python -c 'import mimetypes;print(mimetypes.guess_extension("image/jpeg"))' .jpg $

Concur with @sivert – the result of guess_extension() is non-deterministic between mimetypes module initialization.

$ python
Python 3.4.3 (default, Nov 17 2016, 01:08:31) 
[GCC 4.8.4] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> 
$ python -c 'import mimetypes;print(mimetypes.guess_extension("image/jpeg"))'
.jpe
$ python -c 'import mimetypes;print(mimetypes.guess_extension("image/jpeg"))'
.jpe
$ python -c 'import mimetypes;print(mimetypes.guess_extension("image/jpeg"))'
.jpe
$ python -c 'import mimetypes;print(mimetypes.guess_extension("image/jpeg"))'
.jpeg
$ python -c 'import mimetypes;print(mimetypes.guess_extension("image/jpeg"))'
.jpeg
$ python -c 'import mimetypes;print(mimetypes.guess_extension("image/jpeg"))'
.jpe
$ python -c 'import mimetypes;print(mimetypes.guess_extension("image/jpeg"))'
.jpg
$

History
Date	User	Action	Args
2017-05-08 19:15:23	dhess	set	recipients: + dhess, barry, terry.reedy, pitrou, wichert, a.badger, r.david.murray, siona, l0nwlf, wodny, sivert
2017-05-08 19:15:23	dhess	set	messageid: <1494270923.69.0.965088456423.issue4963@psf.upfronthosting.co.za>
2017-05-08 19:15:23	dhess	link	issue4963 messages
2017-05-08 19:15:23	dhess	create