[Pysparse-users] pysparse and multiprocessing

[Eduardo L. C. <le...@jo...>]

Hi,

I am trying to use the pool method of
multiprocessing. Each process has
as input a number and a class. This class has
a sparse matrix (pysparse ll_mat) inside it.

The problem is that the class must be pickled
and depickled when moving around processes and
I am having the following error:


Exception in thread Thread-1:
Traceback (most recent call last):
  File "/usr/lib/python2.6/threading.py", line 532, in __bootstrap_inner
    self.run()
  File "/usr/lib/python2.6/threading.py", line 484, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/usr/lib/python2.6/multiprocessing/pool.py", line 225, in
_handle_tasks
    put(task)
UnpickleableError: Cannot pickle <type 'll_mat'> objects

I am searching all around and could not find any tip to
solve this problem. Any clue ?

Thanks,
Eduardo.




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