Message 285101 - 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.

Author	arigo
Recipients	arigo, brett.cannon, gregory.p.smith, larry, rhettinger, serhiy.storchaka, vstinner, yselivanov
Date	2017-01-10.09:16:10
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<[email protected]>
In-reply-to

Content
(S6) 'xxx' % b'foo' == 'xxx' b'xxx' % b'foo' raises TypeError The first case is because PyMapping_Check() is true on b'foo', so it works like 'xxx' % {...}, which always just returns 'xxx'. The second case is because _PyBytes_Format() contains more special cases, for bytes and bytearray, which are not present in PyUnicode_Format().

(S6) 'xxx' % b'foo' == 'xxx'
     b'xxx' % b'foo' raises TypeError

The first case is because PyMapping_Check() is true on b'foo', so it works like 'xxx' % {...}, which always just returns 'xxx'.  The second case is because _PyBytes_Format() contains more special cases, for bytes and bytearray, which are not present in PyUnicode_Format().

History
Date	User	Action	Args
2017-01-10 09:16:10	arigo	set	recipients: + arigo, brett.cannon, rhettinger, gregory.p.smith, vstinner, larry, serhiy.storchaka, yselivanov
2017-01-10 09:16:10	arigo	set	messageid: <[email protected]>
2017-01-10 09:16:10	arigo	link	issue28885 messages
2017-01-10 09:16:10	arigo	create