Hi!
Trying to make my group cohomology package work in both py2 and py3, I
already thought it was done, but I found that a pickle created with py3
cannot be read by py2. It would of course be possible to argue that people
are unlikely to unpickle a py3 pickle with py2, and since unpickling a
py2 pickle with py3 seems to work, we shouldn't care.
But just in case I wanted to ask if you know of an easy fix.
According to explain_pickle, the following happens:
sage: pg_RESL_sparse_unpickle_class =
unpickle_global('pGroupCohomology.resolution', 'RESL_sparse_unpickle_class')
sage: si1 = unpickle_newobj(pg_RESL_sparse_unpickle_class, ())
Traceback (most recent call last):
...
UnpicklingError: NEWOBJ class argument isn't a type object
What does that error mean? In fact, the class IS a type:
sage: from pGroupCohomology.resolution import RESL_sparse_unpickle_class
sage: isinstance(_, type)
True
Best regards,
Simon
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