Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > de.comp.lang.python > #5627

[Python-de] multiprocessing mit shared mem not working

Show key headers only | View raw

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 = smm.ShareableList(range(2000))
          # Divide the work among two processes, storing partial results 
in sl
          p1 = Process(target=do_work, args=(sl, 0, 1000))
          print (p1)
          p2 = Process(target=do_work, args=(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 = sum(sl)  # Consolidate the partial results now 
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()

Back to de.comp.lang.python | Previous | Next — Next in thread | Find similar

Thread

[Python-de] multiprocessing mit shared mem not working "Joachim Sasse" <sasse@simply-running-systems.com> - 2020-03-08 14:41 +0000
  Re: [Python-de] multiprocessing mit shared mem not working Hermann Riemann <nospam.ng@hermann-riemann.de> - 2020-03-08 16:50 +0100

csiph-web