New submission from Torsten Landschoff <t.landsch...@gmx.net>:
When trying to send an object via a Queue that can't be pickled, one gets a
quite unhelpful traceback:
Traceback (most recent call last):
File "/usr/lib/python2.6/multiprocessing/queues.py", line 242, in _feed
send(obj)
PicklingError: Can't pickle <type 'module'>: attribute lookup
__builtin__.module failed
I have no idea where I am sending this. It would be helpful to get the call
trace to the call to Queue.put.
My workaround was to create a Queue via this function MyQueue:
def MyQueue():
import cPickle
def myput(obj, *args, **kwargs):
cPickle.dumps(obj)
return orig_put(obj, *args, **kwargs)
q = Queue()
orig_put, q.put = q.put, myput
return q
That way I get the pickle exception in the caller to put and was able to find
out the offending code.
----------
components: Library (Lib)
messages: 125996
nosy: torsten
priority: normal
severity: normal
status: open
title: Unhelpful backtrace for multiprocessing.Queue
type: feature request
versions: Python 2.6
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue10886>
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