[New-bugs-announce] [issue4311] Race condition on Multiprocessing module documentation

[Alejandro]

New submission from Alejandro <alejolp at alejolp.com>:

The "devel" documentation of the "Multiprocessing" module at the
"Exchanging objects between processes" section has the following example
snippet:

from multiprocessing import Process, Queue

def f(q):
    q.put([42, None, 'hello'])

 if __name__ == '__main__':
     q = Queue()
     p = Process(target=f, args=(q,))
     p.start()
     print q.get()    # prints "[42, None, 'hello']"
     p.join()

The last two lines should be swapped to avoid a race condition:

     p.join()
     print q.get()    # prints "[42, None, 'hello']"

BTW, Nice work. Keep on going folks =)

----------
assignee: georg.brandl
components: Documentation
messages: 75804
nosy: alejolp, georg.brandl
severity: normal
status: open
title: Race condition on Multiprocessing module documentation
versions: Python 2.7

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue4311>
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