Check 2to3 for support of print function.

[ericvsmith]

BPO	2412
Nosy	@ericvsmith, @benjaminp, @wolever
Files	print_function_detection.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 = None
closed_at = <Date 2009-07-12.17:07:09.633>
created_at = <Date 2008-03-18.23:42:17.813>
labels = ['type-bug', 'expert-2to3']
title = 'Check 2to3 for support of print function.'
updated_at = <Date 2009-07-12.17:07:09.632>
user = 'https://github.com/ericvsmith'

bugs.python.org fields:

activity = <Date 2009-07-12.17:07:09.632>
actor = 'benjamin.peterson'
assignee = 'collinwinter'
closed = True
closed_date = <Date 2009-07-12.17:07:09.633>
closer = 'benjamin.peterson'
components = ['2to3 (2.x to 3.x conversion tool)']
creation = <Date 2008-03-18.23:42:17.813>
creator = 'eric.smith'
dependencies = []
files = ['10081']
hgrepos = []
issue_num = 2412
keywords = ['patch']
message_count = 6.0
messages = ['64017', '64085', '64087', '65709', '65830', '90453']
nosy_count = 4.0
nosy_names = ['collinwinter', 'eric.smith', 'benjamin.peterson', 'wolever']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = None
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue2412'
versions = ['Python 2.6']

[ericvsmith]

bpo-1633807 is a backport of the print function to 2.6, using a
__future__ import. Once it is committed, we need to ensure that 2to3
does the right thing (namely, nothing) with print functions in modules
that have the __future__ import.

[wolever]

I've updated the fixer (checkin to come shortly), but 2to3 gets upset when
you it comes across print statements with kwargs (eg: print("spam", end="
")), so the tests will be commented out 'till this is fixed.

[wolever]

As of r61635, the fix_print fixer has been fixed and tests have been added
(which will assert False when 2to3 is fixed so it can handle
print(**kwargs)).

[wolever]

Here is a patch that will detect a from __future__ import print_function
and adjust the grammar appropriately.

Any objections?

[collinwinter]

Reviewing...

[benjaminp]

Fixed in r73981.