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GH-116526 patch documentation Synchronization between processes example #116527

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GH-116526 patch documentation Synchronization between processes example #116527

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9 changes: 8 additions & 1 deletion Doc/library/multiprocessing.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -301,8 +301,15 @@ that only one process prints to standard output at a time::
if __name__ == '__main__':
lock = Lock()

processes = []

for num in range(10):
Process(target=f, args=(lock, num)).start()
p = Process(target=f, args=(lock, num))
processes.append(p)
p.start()

for p in processes:
p.join()

Without using the lock output from the different processes is liable to get all
mixed up.
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