[issue9144] Import error for multiprocessing in 2.7rc2 on Windows
Martin v. Löwis mar...@v.loewis.de added the comment: Here is the problem: there is no module multiprocessing._multiprocessing; _multiprocessing is a global module. However, multiprocessing/__init__.py imports _multiprocessing, providing multiprocessing._multiprocessing as a valid attribute. sys.modules['multiprocessing._multiprocessing'] is None. Now, on Windows, for some reason, from ._multiprocessing import win32 is used. In 2.6, this used to work. In 2.7, due to r81380, it stopped working (i.e. if I revert r81380, it works again). Adding Brett to the nosy list, as he made this change. -- nosy: +brett.cannon ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9144 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9144] Import error for multiprocessing in 2.7rc2 on Windows
Paul Moore p.f.mo...@gmail.com added the comment: Martin's analysis (and the description of the commit he refers to) indicates that the correct fix is Cuiseppe's suggestion to change the relative imports to absolute: from _multiprocessing import ... as the previous code was only working because, as a result of the bug fixed in r81380, from ._multiprocessing was falling back to this form anyway. -- nosy: +pmoore ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9144 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9144] Import error for multiprocessing in 2.7rc2 on Windows
Paul Moore p.f.mo...@gmail.com added the comment: Here's a patch implementing the suggested change. test_multiprocessing passes. I am just running the full test suite now. -- keywords: +patch Added file: http://bugs.python.org/file17849/mp.diff ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9144 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9144] Import error for multiprocessing in 2.7rc2 on Windows
Paul Moore p.f.mo...@gmail.com added the comment: Full test suite also looks OK. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9144 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9144] Import error for multiprocessing in 2.7rc2 on Windows
Jesse Noller jnol...@gmail.com added the comment: the patch looks good to me - unless someone beats me to it, I'm going to commit it shortly to fix 2.7 -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9144 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9144] Import error for multiprocessing in 2.7rc2 on Windows
Jesse Noller jnol...@gmail.com added the comment: Pushed it in r82489 - worked for me on Linux and OS/X. Please let me know if anything else comes up. -- status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9144 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9144] Import error for multiprocessing in 2.7rc2 on Windows
New submission from Giuseppe Ottaviano giu...@gmail.com: With a fresh install from python-2.7rc2.amd64.msi (rc1 is also affected) multiprocessing gives the following error: Python 2.7rc2 (r27rc2:82154, Jun 22 2010, 21:22:29) [MSC v.1500 64 bit (AMD64)] on win32 Type help, copyright, credits or license for more information. import multiprocessing multiprocessing.Pool() Traceback (most recent call last): File stdin, line 1, in module File C:\Python27\lib\multiprocessing\__init__.py, line 227, in Pool return Pool(processes, initializer, initargs, maxtasksperchild) File C:\Python27\lib\multiprocessing\pool.py, line 89, in __init__ self._setup_queues() File C:\Python27\lib\multiprocessing\pool.py, line 181, in _setup_queues from .queues import SimpleQueue File C:\Python27\lib\multiprocessing\queues.py, line 22, in module from multiprocessing.synchronize import Lock, BoundedSemaphore, Semaphore, Condition File C:\Python27\lib\multiprocessing\synchronize.py, line 22, in module from multiprocessing.forking import assert_spawning, Popen File C:\Python27\lib\multiprocessing\forking.py, line 158, in module from ._multiprocessing import win32, Connection, PipeConnection ImportError: No module named _multiprocessing I noticed that _multiprocessing.lib is not in Lib/multiprocessing/ but in libs/, so I don't know why there is a relative import here. Changing all the occurrences to from _multiprocessing import ... everything works fine. -- components: Library (Lib) messages: 109109 nosy: ot priority: normal severity: normal status: open title: Import error for multiprocessing in 2.7rc2 on Windows type: crash versions: Python 2.7 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9144 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9144] Import error for multiprocessing in 2.7rc2 on Windows
Changes by Georg Brandl ge...@python.org: -- assignee: - benjamin.peterson nosy: +benjamin.peterson priority: normal - high ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9144 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9144] Import error for multiprocessing in 2.7rc2 on Windows
Changes by Georg Brandl ge...@python.org: -- priority: high - release blocker ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9144 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9144] Import error for multiprocessing in 2.7rc2 on Windows
Changes by Éric Araujo mer...@netwok.org: -- components: +Build -Library (Lib) nosy: +merwok resolution: - accepted ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9144 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9144] Import error for multiprocessing in 2.7rc2 on Windows
Benjamin Peterson benja...@python.org added the comment: Martin, any ideas? -- nosy: +loewis ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9144 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9144] Import error for multiprocessing in 2.7rc2 on Windows
Changes by Nick Coghlan ncogh...@gmail.com: -- nosy: +jnoller ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9144 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
