Alexandre Vassalotti added the comment:
Look like I isolated the problem. It seems multiprocessing is using cPickle
which cannot be extended with ForkingPickler, unlike the Python version of the
pickle module.
15:09:29 [ ~/pythondev/python2.7 ]$ ./python.exe issue10717.py
Traceback (most recent call last):
File "issue10717.py", line 8, in <module>
p.apply(Test().hello, ("jimbo",))
File "/Users/avassalotti/PythonDev/python2.7/Lib/multiprocessing/pool.py",
line 244, in apply
return self.apply_async(func, args, kwds).get()
File "/Users/avassalotti/PythonDev/python2.7/Lib/multiprocessing/pool.py",
line 558, in get
raise self._value
cPickle.PicklingError: Can't pickle <type 'instancemethod'>: attribute lookup
__builtin__.instancemethod failed
----------
assignee: alexandre.vassalotti ->
resolution: works for me ->
stage: test needed -> needs patch
status: closed -> open
Added file: http://bugs.python.org/file32933/issue10717.py
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<http://bugs.python.org/issue10717>
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