Message 152195 - Python tracker

➜

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.

In-reply-to
Author	ezio.melotti
Recipients	ezio.melotti, mrabarnett, sjmachin
Date	2012年01月28日.22:42:33
SpamBayes Score	2.8312783e-05
Marked as misclassified	No
Message-id	<1327790554.32.0.914804527022.issue13899@psf.upfronthosting.co.za>

Content
This happens because \A, \B and \Z are valid escape sequences[0]. If what you mean is that they shouldn't be recognized as such inside a character class, then I can agree with that. ^ and $ are similar to \A and \Z but they are considered as literals inside []. I think the same could also be applied to \b and \B, unless you expect r'[\b]' to match the same as r'\b'. (On an unrelated note, it's preferable to avoid using ints as flag -- using re.DEBUG is better) [0]: http://docs.python.org/library/re.html#regular-expression-syntax

Content

This happens because \A, \B and \Z are valid escape sequences[0].
If what you mean is that they shouldn't be recognized as such inside a character class, then I can agree with that.
^ and $ are similar to \A and \Z but they are considered as literals inside []. I think the same could also be applied to \b and \B, unless you expect r'[\b]' to match the same as r'\b'.
(On an unrelated note, it's preferable to avoid using ints as flag -- using re.DEBUG is better)
[0]: http://docs.python.org/library/re.html#regular-expression-syntax

History
Date	User	Action	Args
2012年01月28日 22:42:34	ezio.melotti	set	recipients: + ezio.melotti, sjmachin, mrabarnett
2012年01月28日 22:42:34	ezio.melotti	set	messageid: <1327790554.32.0.914804527022.issue13899@psf.upfronthosting.co.za>
2012年01月28日 22:42:33	ezio.melotti	link	issue13899 messages
2012年01月28日 22:42:33	ezio.melotti	create

homepage