Message 215752 - Python tracker

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Author	vinay.sajip
Recipients	alan.briolat, vinay.sajip
Date	2014-04-08.10:56:56
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1396954617.29.0.755157984085.issue21172@psf.upfronthosting.co.za>
In-reply-to

Content
I wouldn't say it is a bug, as it is working as documented - though you might say it is a request for enhancement. The documentation for string formatting at https://docs.python.org/2/library/stdtypes.html#string-formatting-operations says that the argument should be a "single mapping object", and, further down the same page at https://docs.python.org/2/library/stdtypes.html#mapping-types-dict it's clear that the mapping protocol is more than just __getitem__. Although perhaps currently only __getitem__ is used, who's to say that such will always remain the case? Removing Python versions 3.2, 3.3 (security fixes only).

I wouldn't say it is a bug, as it is working as documented - though you might say it is a request for enhancement. The documentation for string formatting at

https://docs.python.org/2/library/stdtypes.html#string-formatting-operations

says that the argument should be a "single mapping object", and, further down the same page at

https://docs.python.org/2/library/stdtypes.html#mapping-types-dict

it's clear that the mapping protocol is more than just __getitem__. Although perhaps currently only __getitem__ is used, who's to say that such will always remain the case?

Removing Python versions 3.2, 3.3 (security fixes only).

History
Date	User	Action	Args
2014-04-08 10:56:57	vinay.sajip	set	recipients: + vinay.sajip, alan.briolat
2014-04-08 10:56:57	vinay.sajip	set	messageid: <1396954617.29.0.755157984085.issue21172@psf.upfronthosting.co.za>
2014-04-08 10:56:57	vinay.sajip	link	issue21172 messages
2014-04-08 10:56:56	vinay.sajip	create