[issue19895] Cryptic error when subclassing multiprocessing classes

Change by SilentGhost : -- resolution: -> duplicate stage: -> resolved status: open -> closed superseder: -> multiprocessing.JoinableQueue requires new kwarg type: -> behavior ___ Python tracker _

[issue19895] Cryptic error when subclassing multiprocessing classes

Change by Antony Lee : -- nosy: -Antony.Lee ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.pyt

[issue19895] Cryptic error when subclassing multiprocessing classes

Change by Mark Lawrence : -- nosy: -BreamoreBoy ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail

[issue19895] Cryptic error when subclassing multiprocessing classes

Dan O'Reilly added the comment: This is basically the same thing that issue21367 is reporting. -- nosy: +dan.oreilly ___ Python tracker ___ __

[issue19895] Cryptic error when subclassing multiprocessing classes

Mark Lawrence added the comment: @Richard have you had any thoughts about this? -- nosy: +BreamoreBoy versions: +Python 3.5 ___ Python tracker ___ ___

[issue19895] Cryptic error when subclassing multiprocessing classes

Changes by Antoine Pitrou : -- nosy: +sbt ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.o

[issue19895] Cryptic error when subclassing multiprocessing classes

New submission from Antony Lee: Classes defined in the multiprocessing module are in fact functions that call the internally defined class constructor with the "ctx" argument properly set; because of that, trying to subclass them yields a (very?) cryptic error message: >>> import multiprocessi