New submission from Pablo Galindo Salgado <[email protected]>:
After applying the PRs in issue34172, multiprocessing.Pool.imap hangs on MacOs
and Linux. This is a simple reproducer:
import multiprocessing
def the_test():
print("Begin")
for x in multiprocessing.Pool().imap(int,
["4", "3"]):
print(x)
print("End")
the_test()
This happens because the IMapIterator does not maintain alive the
multiprocessing.Pool object while it is still alive.
----------
components: Library (Lib)
messages: 330890
nosy: pablogsal, pitrou, tzickel
priority: normal
severity: normal
status: open
title: multiprocessing.Pool.imaps iterators do not maintain alive the
multiprocessing.Pool objects
versions: Python 3.7, Python 3.8
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Python tracker <[email protected]>
<https://bugs.python.org/issue35378>
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