Message 293249 - 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	2017-05-08.19:35:57
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<[email protected]>
In-reply-to

Content
And the underlying problem causing this: $ python -c 'import mimetypes;print(mimetypes.guess_all_extensions("image/jpeg"))' ['.jpeg', '.jpg', '.jpe'] $ python -c 'import mimetypes;print(mimetypes.guess_all_extensions("image/jpeg"))' ['.jpg', '.jpe', '.jpeg'] $ python -c 'import mimetypes;print(mimetypes.guess_all_extensions("image/jpeg"))' ['.jpg', '.jpeg', '.jpe'] $ python -c 'import mimetypes;print(mimetypes.guess_all_extensions("image/jpeg"))' ['.jpe', '.jpg', '.jpeg'] $ python -c 'import mimetypes;print(mimetypes.guess_all_extensions("image/jpeg"))' ['.jpeg', '.jpg', '.jpe'] $ If the module can't know which extension is preferred, perhaps guess_extension should just be deprecated and the results of guess_all_extensions sorted on return? At least that would give us some determinism to work with.

And the underlying problem causing this:

$ python -c 'import mimetypes;print(mimetypes.guess_all_extensions("image/jpeg"))'
['.jpeg', '.jpg', '.jpe']
$ python -c 'import mimetypes;print(mimetypes.guess_all_extensions("image/jpeg"))'
['.jpg', '.jpe', '.jpeg']
$ python -c 'import mimetypes;print(mimetypes.guess_all_extensions("image/jpeg"))'
['.jpg', '.jpeg', '.jpe']
$ python -c 'import mimetypes;print(mimetypes.guess_all_extensions("image/jpeg"))'
['.jpe', '.jpg', '.jpeg']
$ python -c 'import mimetypes;print(mimetypes.guess_all_extensions("image/jpeg"))'
['.jpeg', '.jpg', '.jpe']
$ 

If the module can't know which extension is preferred, perhaps guess_extension should just be deprecated and the results of guess_all_extensions sorted on return?

At least that would give us some determinism to work with.

History
Date	User	Action	Args
2017-05-08 19:35:57	dhess	set	recipients: + dhess, barry, terry.reedy, pitrou, wichert, a.badger, r.david.murray, siona, l0nwlf, wodny, sivert
2017-05-08 19:35:57	dhess	set	messageid: <[email protected]>
2017-05-08 19:35:57	dhess	link	issue4963 messages
2017-05-08 19:35:57	dhess	create