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Merged revisions 74055 via svnmerge from

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svn+ssh://svn.python.org/python/branches/py3k

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  r74055 | alexandre.vassalotti | 2009-07-17 11:18:18 +0200 (Fr, 17 Jul 2009) | 55 lines

  Merged revisions 73995,74002,74005,74007-74008,74011,74019-74023 via svnmerge from
  svn+ssh://pythondev@svn.python.org/python/trunk

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    r74008 | benjamin.peterson | 2009-07-14 20:46:42 -0400 (Tue, 14 Jul 2009) | 1 line

    update year
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    r74011 | ezio.melotti | 2009-07-15 13:07:04 -0400 (Wed, 15 Jul 2009) | 1 line

    methods' names pep8ification
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    r74019 | amaury.forgeotdarc | 2009-07-15 17:29:27 -0400 (Wed, 15 Jul 2009) | 2 lines

    #6076 Add a title to the IDLE Preferences window.
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    r74020 | georg.brandl | 2009-07-16 03:18:07 -0400 (Thu, 16 Jul 2009) | 1 line

    #5910: fix kqueue for calls with more than one event.
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    r74021 | georg.brandl | 2009-07-16 03:33:04 -0400 (Thu, 16 Jul 2009) | 1 line

    #6486: start with built in functions rather than "built in objects".
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    r74022 | georg.brandl | 2009-07-16 03:38:35 -0400 (Thu, 16 Jul 2009) | 1 line

    #6481: fix typo in os.system() replacement.
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    r74023 | jesse.noller | 2009-07-16 10:23:04 -0400 (Thu, 16 Jul 2009) | 1 line

    Issue 6433: multiprocessing.pool.map hangs on empty list
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This commit is contained in:
Georg Brandl 2009-08-13 12:26:19 +00:00
parent a85ee5cfb6
commit d80344f8d3
10 changed files with 37 additions and 7 deletions
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2
Lib/multiprocessing/pool.py
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@ -208,6 +208,8 @@ class Pool(object):
chunksize, extra = divmod(len(iterable), len(self._pool) * 4)
if extra:
chunksize += 1
if len(iterable) == 0:
chunksize = 0
task_batches = Pool._get_tasks(func, iterable, chunksize)
result = MapResult(self._cache, chunksize, len(iterable), callback)