Add -3 warning for absolute imports.

[mdickinson]

BPO	7844
Nosy	@jcea, @mdickinson, @ericvsmith, @benjaminp, @ezio-melotti

^{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 2012-09-26.17:13:29.414>
created_at = <Date 2010-02-03.13:51:20.045>
labels = ['interpreter-core', 'type-feature']
title = 'Add -3 warning for absolute imports.'
updated_at = <Date 2012-09-26.17:13:29.413>
user = 'https://github.com/mdickinson'

bugs.python.org fields:

activity = <Date 2012-09-26.17:13:29.413>
actor = 'mark.dickinson'
assignee = 'none'
closed = True
closed_date = <Date 2012-09-26.17:13:29.414>
closer = 'mark.dickinson'
components = ['Interpreter Core']
creation = <Date 2010-02-03.13:51:20.045>
creator = 'mark.dickinson'
dependencies = []
files = []
hgrepos = []
issue_num = 7844
keywords = []
message_count = 3.0
messages = ['98781', '106459', '106475']
nosy_count = 5.0
nosy_names = ['jcea', 'mark.dickinson', 'eric.smith', 'benjamin.peterson', 'ezio.melotti']
pr_nums = []
priority = 'normal'
resolution = 'out of date'
stage = 'needs patch'
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue7844'
versions = ['Python 2.7']

[mdickinson]

It would be good to have a -3 warning for any use of import in 2.7 whose semantics change in 3.x, as a result of the absolute imports PEP (PEP-328).

[ezio-melotti]

Benjamin, are we still in time for this if someone provides a patch?

[benjaminp]

Yes, if soonish.