#10962: Set_PythonType objects are not picklable
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Reporter: stumpc5 | Owner: was
Type: defect | Status: needs_review
Priority: major | Milestone: sage-6.5
Component: pickling | Resolution:
Keywords: | Merged in:
Authors: Vincent Delecroix | Reviewers: Jeroen Demeyer
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/jdemeyer/ticket/10962 | edf526e2a9b181c058620e1b42b1b378c37d99a7
Dependencies: | Stopgaps:
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Comment (by nthiery):
Replying to [comment:15 vdelecroix]:
> Replying to [comment:13 jdemeyer]:
> > Question: would it be valid to use `Set_PythonType()` on a `Category`
instead of a `type`?
>
> No. By the way I do not understand why `Posets` and `Sequences` are
categories and not `Parent`...
The category corresponding to `Parent` is `Sets`. Now, why is there both
`Parent` and `Sets`? The latter is an abstract class, while the former is
a concrete implementation (and currently the only concrete base
implementation; but we could imagine having others). Of course, a lot of
the current features of `Parent` really should be moved up in `Sets` or in
other categories. Some just need to be taken care of (handling some
backward compatibility issues). Some are more intrinsically difficult
because of the lack of multiple inheritance in Cython; that's analog to
the `Ring` versus `Rings`
situation.
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Ticket URL: <http://trac.sagemath.org/ticket/10962#comment:22>
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