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From: "Joachim Sasse" <sasse@simply-running-systems.com>
Newsgroups: de.comp.lang.python
Subject: [Python-de] multiprocessing mit shared mem not working
Date: Sun, 08 Mar 2020 14:41:33 +0000
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Xref: csiph.com de.comp.lang.python:5627

Hello ,

it is not working - only a little test -  what is wrong ?

# Python -- v3.8 - windows 10

from multiprocessing import Process, Queue, managers
import time


def with_shared_memory():
     with managers.SharedMemoryManager() as smm:
          sl =3D smm.ShareableList(range(2000))
          # Divide the work among two processes, storing partial results=20
in sl
          p1 =3D Process(target=3Ddo_work, args=3D(sl, 0, 1000))
          print (p1)
          p2 =3D Process(target=3Ddo_work, args=3D(sl, 1000, 2000))
          p1.start()
          p2.start()  # A multiprocessing.Pool might be more efficient
          p1.join()
          p2.join()   # Wait for all work to complete in both processes
          total_result =3D sum(sl)  # Consolidate the partial results now=
=20
in sl
          print (total_result)


def do_work(data,von,bis):
     print (von,bis)
     for i in range(von,bis):
         data.append(i)


with_shared_memory()