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From: =?ISO-8859-1?Q?Dar=EDo_Su=E1rez_Gracia?= <dario.suarez@telefonica.net>
To: python-list@python.org
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Subject: shared dictionary of dictionaries with Manager
Date: Thu, 21 Apr 2011 18:00:27 +0200
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Hi all,
I was trying to share a dictionary of dictionaries of arrays with =20
Manager from multiprocessing. Without multiprocessing the code works =20
perfectly, but with the current example the last print does not show =20
the correct result.

Any hint?

Thanks,
Dar=EDo Su=E1rez=

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#!/usr/local/bin/python2.7
import sys
import warnings
from multiprocessing import Pool, Value, Array, Manager


N_PROCESSES = 8


def f(results, key):

    results[key]['d'][3].append(1)

def main():
  
    pool = Pool(processes=N_PROCESSES)
    manager = Manager()
    
    results = manager.dict()

    for key in ['k', 'kk']:
        results[key] = dict([(key2, [[] for i in range(4)]) for key2 in ['d', 'dd']])


    res = [ pool.apply_async(f, key) for key in ['k'] ]
    map(lambda x: x.wait(), res)

    print results['k']
    print results['k']['d']
    print results['k']['d'][3]
    

if __name__ == "__main__":
    main()

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