[issue6766] Cannot modify dictionaries inside dictionaries using Managers from multiprocessing

Dusan Gligoric <7...@protonmail.com> added the comment: Hey folks, This is still an issue with 3.7.2 === # Python 3.7.2 (default, Jan 10 2019, 23:51:51) # [GCC 8.2.1 20181127] on linux from multiprocessing import Manager manager = Manager() d =

[issue6766] Cannot modify dictionaries inside dictionaries using Managers from multiprocessing

Snidhi Sofpro added the comment: Hi team, Looks like this issue remains per code below: import multiprocessing, sys, time, traceback; if __name__ == '__main__': print(sys.version); mpd = multiprocessing.Manager().dict(); mpd['prcss'] = {'q' : 'queue_1',

[issue6766] Cannot modify dictionaries inside dictionaries using Managers from multiprocessing

Johannes added the comment: Hi all, I'm trying to use multiprocessing with a 3d list. From the documentation I expected it to work. As I found this report a bid later, I opened a bug report here: https://bugs.python.org/issue32538. Am I doing sth. wrong or is it

[issue6766] Cannot modify dictionaries inside dictionaries using Managers from multiprocessing

Changes by Berker Peksag : -- status: open -> closed ___ Python tracker ___ ___

[issue6766] Cannot modify dictionaries inside dictionaries using Managers from multiprocessing

Davin Potts added the comment: Fixed in upcoming 3.6. -- resolution: -> fixed stage: patch review -> resolved ___ Python tracker ___

[issue6766] Cannot modify dictionaries inside dictionaries using Managers from multiprocessing

Roundup Robot added the comment: New changeset 39e7307f9aee by Davin Potts in branch 'default': Fixes issue #6766: Updated multiprocessing Proxy Objects to support nesting https://hg.python.org/cpython/rev/39e7307f9aee -- nosy: +python-dev ___ Python

[issue6766] Cannot modify dictionaries inside dictionaries using Managers from multiprocessing

Davin Potts added the comment: Attaching updated patch to reflect Yury's suggested changes from review. -- Added file: http://bugs.python.org/file44453/issue_6766_py36.nogit.yuryfeedback.patch ___ Python tracker

[issue6766] Cannot modify dictionaries inside dictionaries using Managers from multiprocessing

Davin Potts added the comment: Updating previously supplied patch for 3.6 to the right format. -- Added file: http://bugs.python.org/file8/issue_6766_py36.nogit.patch ___ Python tracker

[issue6766] Cannot modify dictionaries inside dictionaries using Managers from multiprocessing

Davin Potts added the comment: Attaching patch for default (3.6) branch which implements what was previously described and discussed, updates the documentation to explain this updated behavior, and includes new tests. @yselivanov: Can you think of any edge cases that should be handled but

[issue6766] Cannot modify dictionaries inside dictionaries using Managers from multiprocessing

Davin Potts added the comment: Two core issues are compounding one another here: 1. An un-pythonic, inconsistent behavior currently exists with how managed lists and dicts return different types of values. 2. Confusion comes from reading what is currently in the docs regarding the expected

[issue6766] Cannot modify dictionaries inside dictionaries using Managers from multiprocessing

Changes by Davin Potts : -- assignee: jnoller -> davin ___ Python tracker ___ ___

[issue6766] Cannot modify dictionaries inside dictionaries using Managers from multiprocessing

Justin Patrin added the comment: I'm still running into these issues with Python 2.7.10. I'm trying to find a way to share dynamically allocated sub-dictionaries through multiprocessing as well as dynamically allocated RLock and Value instances. I can use the manager to create them but when I

[issue6766] Cannot modify dictionaries inside dictionaries using Managers from multiprocessing

Changes by Ned Deily n...@acm.org: -- nosy: +davin, sbt ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue6766 ___ ___ Python-bugs-list mailing list

[issue6766] Cannot modify dictionaries inside dictionaries using Managers from multiprocessing

Changes by Dan O'Reilly oreil...@gmail.com: -- nosy: +dan.oreilly versions: +Python 3.3 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue6766 ___ ___

[issue6766] Cannot modify dictionaries inside dictionaries using Managers from multiprocessing

Richard Fothergill added the comment: I'm getting these results on both: Python 3.2.3 (default, Apr 10 2013, 06:11:55) [GCC 4.6.3] on linux2 and Python 2.7.3 (default, Apr 10 2013, 06:20:15) [GCC 4.6.3] on linux2 The symptoms are exactly as Terrence described. Nesting proxied containers is

[issue6766] Cannot modify dictionaries inside dictionaries using Managers from multiprocessing

Changes by Ezio Melotti ezio.melo...@gmail.com: -- stage: - needs patch versions: +Python 2.7 -Python 2.6 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue6766 ___

[issue6766] Cannot modify dictionaries inside dictionaries using Managers from multiprocessing

Darío Suárez Gracia dario.sua...@telefonica.net added the comment: Hello, Trying to share a dictionary of dictionaries of lists with a manager I get the same problem with the patch applied in Python 2.7 (r27:82500, Nov 24 2010, 18:24:29) [GCC 4.1.2 20080704 (Red Hat 4.1.2-48)] on linux2. The

[issue6766] Cannot modify dictionaries inside dictionaries using Managers from multiprocessing

Kaushik Ghose kgh...@users.sf.net added the comment: Even with the patch, I can not resolve this problem. I can reproduce the problem with the patched version with the following code. My system is: Python 2.6.4 (r264:75821M, Oct 27 2009, 19:48:32) IPython 0.10 Platform is Mac OS X (10.5.8)

[issue6766] Cannot modify dictionaries inside dictionaries using Managers from multiprocessing

Terrence Cole terre...@zettabytestorage.com added the comment: Kaushik, in your example, d is a dict proxy, so assignment to d['f'] correctly ferries the assignment (a new normal dict) to the d['f'] in the original process. The new dict, however, is not a dict proxy, it's just a dict, so

[issue6766] Cannot modify dictionaries inside dictionaries using Managers from multiprocessing

Terrence Cole terre...@zettabytestorage.com added the comment: I get the same results on: Python 2.6.2 (r262:71600, Sep 14 2009, 18:47:57) [GCC 4.3.2] on linux2 I think this is the same issue I was seeing yesterday. You can exercise the issue and cause an exception with just 6 lines: #

[issue6766] Cannot modify dictionaries inside dictionaries using Managers from multiprocessing

Terrence Cole terre...@zettabytestorage.com added the comment: When a manager receives a message, it unpickles the arguments; this calls BaseProxy.__reduce__, which calls RebuildProxy. If we are in the manager, this returns the actual object, otherwise it returns a new proxy. If we naively

[issue6766] Cannot modify dictionaries inside dictionaries using Managers from multiprocessing

Terrence Cole terre...@zettabytestorage.com added the comment: The tests for the SyncManager are being automagically generated at import time -- I was not quite able to follow that well enough to know exactly what is getting tested, or if they are even enabled. It did not appear to contain any

[issue6766] Cannot modify dictionaries inside dictionaries using Managers from multiprocessing

Jesse Noller jnol...@gmail.com added the comment: Yeah, the auto-generation is too clever and needs to be pulled out entirely. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue6766 ___

[issue6766] Cannot modify dictionaries inside dictionaries using Managers from multiprocessing

New submission from Carlos carlo...@gmail.com: It's not possible to modify a dict inside a dict using a manager from multiprocessing. Ex: from multiprocessing import Process,Manager def f(d): d['1'] = '1' d['2']['1'] = 'Try To Write' if __name__ == '__main__': manager =

[issue6766] Cannot modify dictionaries inside dictionaries using Managers from multiprocessing

Changes by R. David Murray rdmur...@bitdance.com: -- assignee: - jnoller nosy: +jnoller ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue6766 ___