Change object.__format__(s) where s is non-empty to a TypeError

[ericvsmith]

BPO	9856
Nosy	@terryjreedy, @ericvsmith, @bitdancer, @asvetlov, @florentx, @serhiy-storchaka
Files	issue9856_python-3.4.diff

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = 'https://github.com/ericvsmith'
closed_at = <Date 2013-05-19.13:11:53.900>
created_at = <Date 2010-09-14.17:26:57.550>
labels = ['interpreter-core', 'easy', 'deferred-blocker', 'type-bug']
title = 'Change object.__format__(s) where s is non-empty to a TypeError'
updated_at = <Date 2014-02-11.23:34:43.381>
user = 'https://github.com/ericvsmith'

bugs.python.org fields:

activity = <Date 2014-02-11.23:34:43.381>
actor = 'python-dev'
assignee = 'eric.smith'
closed = True
closed_date = <Date 2013-05-19.13:11:53.900>
closer = 'r.david.murray'
components = ['Interpreter Core']
creation = <Date 2010-09-14.17:26:57.550>
creator = 'eric.smith'
dependencies = []
files = ['23936']
hgrepos = []
issue_num = 9856
keywords = ['patch', 'easy']
message_count = 21.0
messages = ['116413', '116751', '130681', '130682', '149351', '177970', '177977', '177981', '177983', '177984', '177992', '177994', '189048', '189049', '189062', '189068', '189089', '189107', '189586', '205017', '211041']
nosy_count = 11.0
nosy_names = ['terry.reedy', 'eric.smith', 'Arfrever', 'r.david.murray', 'asvetlov', 'flox', 'python-dev', 'serhiy.storchaka', 'krinart', 'Ankur.Ankan', 'Yogesh.Chaudhari']
pr_nums = []
priority = 'deferred blocker'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue9856'
versions = ['Python 3.4']

[ericvsmith]

In 3.3 the existing PendingDeprecationWarning needs to become a DeprecationWarning. In 3.4 it will become an error.

I'll change 3.3 after 3.2 is released.

See bpo-7994 for the original PendingDeprecationWarning discussion.

[terryjreedy]

Perhaps this could be expanded to "Deprecation warnings in 3.3" with release-blocker priority to list all 3.2 PendingDWs. Once changes are made, it could be retitled "Removals in 3.4", with a new "Deprecation warnings in 3.4" added.

[python-dev]

New changeset ee259a4f3eee by Eric V. Smith in branch 'default':
bpo-9856: Change object.__format__ with a non-empty format string from a PendingDeprecationWarning to a DeprecationWarning.
http://hg.python.org/cpython/rev/ee259a4f3eee

[ericvsmith]

Next step is to make it a TypeError in 3.4.

[florentx]

Patch is ready for python 3.4

:-)

[krinart]

As I can see this is already implemented in 3.4

[python-dev]

New changeset d91c14788729 by Andrew Svetlov in branch 'default':
Issue bpo-9856: Replace deprecation warinigs to raising TypeError in object.__format__
http://hg.python.org/cpython/rev/d91c14788729