Public bug reported:
Trying the examples from
https://docs.python.org/3.5/library/multiprocessing.html#exchanging-objects-between-processes
the example for Pool fails. It's attached. The error implicates something
missing in SimpleQueue
$ python3 Pool.py
Traceback (most recent call last):
File "Pool.py", line 13, in <module>
with Pool(5) as p:
File "/usr/lib/python3.5/multiprocessing/context.py", line 118, in Pool
context=self.get_context())
File "/usr/lib/python3.5/multiprocessing/pool.py", line 150, in __init__
self._setup_queues()
File "/usr/lib/python3.5/multiprocessing/pool.py", line 243, in _setup_queues
self._inqueue = self._ctx.SimpleQueue()
File "/usr/lib/python3.5/multiprocessing/context.py", line 110, in SimpleQueue
from .queues import SimpleQueue
File "/usr/lib/python3.5/multiprocessing/queues.py", line 20, in <module>
from queue import Empty, Full
This also fails in the default 2.7 python, with a simpler (less
informative) error message.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: python3-minimal 3.5.1-3
ProcVersionSignature: Ubuntu 4.4.0-34.53-generic 4.4.15
Uname: Linux 4.4.0-34-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: XFCE
Date: Thu Sep 29 15:04:55 2016
InstallationDate: Installed on 2016-08-08 (52 days ago)
InstallationMedia: Xubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
SourcePackage: python3-defaults
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: python3-defaults (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug xenial
** Attachment added: "Code and comments copied from official Python
documentation"
https://bugs.launchpad.net/bugs/1629123/+attachment/4751361/+files/Pool.py
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Ubuntu.
https://bugs.launchpad.net/bugs/1629123
Title:
multiprocessing.Pool fails
Status in python3-defaults package in Ubuntu:
New
Bug description:
Trying the examples from
https://docs.python.org/3.5/library/multiprocessing.html#exchanging-objects-between-processes
the example for Pool fails. It's attached. The error implicates something
missing in SimpleQueue
$ python3 Pool.py
Traceback (most recent call last):
File "Pool.py", line 13, in <module>
with Pool(5) as p:
File "/usr/lib/python3.5/multiprocessing/context.py", line 118, in Pool
context=self.get_context())
File "/usr/lib/python3.5/multiprocessing/pool.py", line 150, in __init__
self._setup_queues()
File "/usr/lib/python3.5/multiprocessing/pool.py", line 243, in
_setup_queues
self._inqueue = self._ctx.SimpleQueue()
File "/usr/lib/python3.5/multiprocessing/context.py", line 110, in
SimpleQueue
from .queues import SimpleQueue
File "/usr/lib/python3.5/multiprocessing/queues.py", line 20, in <module>
from queue import Empty, Full
This also fails in the default 2.7 python, with a simpler (less
informative) error message.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: python3-minimal 3.5.1-3
ProcVersionSignature: Ubuntu 4.4.0-34.53-generic 4.4.15
Uname: Linux 4.4.0-34-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: XFCE
Date: Thu Sep 29 15:04:55 2016
InstallationDate: Installed on 2016-08-08 (52 days ago)
InstallationMedia: Xubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64
(20160719)
SourcePackage: python3-defaults
UpgradeStatus: No upgrade log present (probably fresh install)
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/python3-defaults/+bug/1629123/+subscriptions
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