Éric Araujo added the comment:
Confirmed (3.2):
>>> def func():
... t = collections.namedtuple('t', 'a')
... instance = t(1)
... print(instance)
... return pickle.dumps(instance)
>>> func()
t(a=1)
Traceback (most recent call last):
File "", line 1, in
File "", line 5, in f
Antoine Pitrou added the comment:
As far as I can tell, this has nothing to do with daemon processes and all to
do with the fact that user-defined classes have to be globally visible for
their instances to be pickled. It is because pickles reference classes by name,
and local names obviously
New submission from Popa Claudiu :
On Unix world, in a daemonized process, any namedtuple instance can't be
pickled, failing with error:
_pickle.PicklingError: Can't pickle class X: attribute lookup __main__.t failed.
This can't be reproduced with the attached code. If I add the created class
i
