[New-bugs-announce] [issue17127] multiprocessing.dummy.Pool does not accept maxtasksperchild argument

[Noah Yetter]

New submission from Noah Yetter:

Python 2.7.3 (default, Apr 10 2012, 23:31:26) [MSC v.1500 32 bit (Intel)] on win32

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The docs claim that "multiprocessing.dummy replicates the API of multiprocessing but is no more than a wrapper around the threading module." however dummy's Pool method does not replicate the API of multiprocessing's Pool method:

>>> import inspect
>>> import multiprocessing
>>> inspect.getargspec(multiprocessing.Pool)
ArgSpec(args=['processes', 'initializer', 'initargs', 'maxtasksperchild'], varargs=None, keywords=None, defaults=(None, None, (), None))
>>> import multiprocessing.dummy
>>> inspect.getargspec(multiprocessing.dummy.Pool)
ArgSpec(args=['processes', 'initializer', 'initargs'], varargs=None, keywords=None, defaults=(None, None, ()))

Thus when attempting to downshift from multiprocessing to threading like so...

import multiprocessing.dummy as multiprocessing

...code that supplies the maxtasksperchild argument to Pool() will not run.

----------
components: Library (Lib)
messages: 181365
nosy: Noah.Yetter
priority: normal
severity: normal
status: open
title: multiprocessing.dummy.Pool does not accept maxtasksperchild argument
type: behavior
versions: Python 2.7, Python 3.3

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17127>
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