This issue tracker has been migrated to GitHub, and is currently read-only.
For more information, see the GitHub FAQs in the Python's Developer Guide.

Author ezio.melotti
Recipients Tuikku.Anttila, detly, docs@python, ezio.melotti, loewis, serhiy.storchaka
Date 2014-08-06.03:11:45
SpamBayes Score -1.0
Marked as misclassified Yes
Message-id <1407294706.09.0.231245246277.issue22046@psf.upfronthosting.co.za>
In-reply-to
Content
After further investigation it seems to me that read can't raise NotImplementedError.  ZipFile also won't raise it, but will raise a RuntimeError:
>>> zipfile.ZipFile('spam.zip', 'w', compression=zipfile.ZIP_BZIP2)
RuntimeError: Compression requires the (missing) bz2 module

By looking at the code, ZipFile calls _check_compression (Lib/zipfile.py:904) and _check_compression raises RuntimeError (Lib/zipfile.py:579).
ZipExtFile calls _get_decompressor (Lib/zipfile.py:651) and _get_decompressor raises NotImplemented (Lib/zipfile.py:610).
This behavior seems inconsistent and perhaps should be fixed (in this case a new issue should be created), however this will probably be backward-incompatible.

Regardless of this, it seems that currently NotImplementedError can be raised in some situations, and the zipfile docs don't mention it, so the doc can still be improved.

@Martin
Do you have any opinion on the aforementioned inconsistency?

@Jason
Did you actually manage to get a NotImplementedError from ZipFile.read() or from somewhere else?
History
Date User Action Args
2014-08-06 03:11:46ezio.melottisetrecipients: + ezio.melotti, loewis, docs@python, serhiy.storchaka, detly, Tuikku.Anttila
2014-08-06 03:11:46ezio.melottisetmessageid: <1407294706.09.0.231245246277.issue22046@psf.upfronthosting.co.za>
2014-08-06 03:11:46ezio.melottilinkissue22046 messages
2014-08-06 03:11:45ezio.melotticreate