#10962: Set_PythonType objects are not picklable
------------------------+---------------------------------------------------
Reporter: stumpc5 | Owner: was
Type: defect | Status: new
Priority: major | Milestone:
Component: pickling | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
------------------------+---------------------------------------------------
Changes (by nthiery):
* cc: sage-combinat (added)
* owner: sage-combinat => was
* component: combinatorics => pickling
Old description:
> This works:
>
> {{{
> sage: Q = CombinatorialFreeModule( QQ, [1,2,3] )
> sage: a = Q.an_element()
> sage: dumps(a)
> ...
> }}}
>
> And this doesn't:
>
> {{{
> sage: Q = CombinatorialFreeModule( QQ,
> sage.structure.parent.Set_PythonType(tuple) )
> sage: a = Q.an_element()
> sage: dumps(a)
> ---------------------------------------------------------------------------
> PicklingError Traceback (most recent call
> last)
> ...
> PicklingError: Can't pickle <type 'function'>: attribute lookup
> __builtin__.function failed
> }}}
New description:
{{{
sage: S = sage.structure.parent.Set_PythonType(tuple)
sage: dumps(S)
------------------------------------------------------------
Traceback (most recent call last):
File "<ipython console>", line 1, in <module>
File "sage_object.pyx", line 842, in
sage.structure.sage_object.dumps (sage/structure/sage_object.c:8274)
File "sage_object.pyx", line 217, in
sage.structure.sage_object.SageObject.dumps
(sage/structure/sage_object.c:2183)
PicklingError: Can't pickle <type 'function'>: attribute lookup
__builtin__.function failed
}}}
--
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10962#comment:1>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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