inspect missing warnings import

[pnasrat]

BPO	14987
Nosy	@brettcannon

^{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/brettcannon'
closed_at = <Date 2012-06-03.02:29:14.080>
created_at = <Date 2012-06-02.22:00:06.655>
labels = ['library']
title = 'inspect missing warnings import'
updated_at = <Date 2012-06-03.02:29:14.080>
user = 'https://bugs.python.org/pnasrat'

bugs.python.org fields:

activity = <Date 2012-06-03.02:29:14.080>
actor = 'brett.cannon'
assignee = 'brett.cannon'
closed = True
closed_date = <Date 2012-06-03.02:29:14.080>
closer = 'brett.cannon'
components = ['Library (Lib)']
creation = <Date 2012-06-02.22:00:06.655>
creator = 'pnasrat'
dependencies = []
files = []
hgrepos = []
issue_num = 14987
keywords = []
message_count = 2.0
messages = ['162184', '162188']
nosy_count = 3.0
nosy_names = ['brett.cannon', 'pnasrat', 'python-dev']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = None
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue14987'
versions = ['Python 3.3']

[pnasrat]

Whilst looking for workarounds to http://bugs.python.org/issue14982 I came across this, which is due to inspect using warnings without having importing it.

Fix is trivial but can upload a patch

Traceback (most recent call last):
  File "t.py", line 7, in <module>
    print(list(iter_modules(path=vcs.__path__, prefix=vcs.__name__+'.')))
  File "/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/pkgutil.py", line 144, in iter_modules
    for name, ispkg in iter_importer_modules(i, prefix):
  File "/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/pkgutil.py", line 202, in iter_modules
    modname = inspect.getmodulename(fn)
  File "/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/inspect.py", line 448, in getmodulename
    info = getmoduleinfo(path)
  File "/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/inspect.py", line 436, in getmoduleinfo
    warnings.warn('inspect.getmoduleinfo() is deprecated', DeprecationWarning,
NameError: global name 'warnings' is not defined

[python-dev]

New changeset 3de5b053d924 by Brett Cannon in branch 'default':
Issue bpo-14987: Add a missing import statement
http://hg.python.org/cpython/rev/3de5b053d924