#21065: Improve pickling error handling
--------------------------------------+---------------------------
Reporter: novoselt | Type: enhancement
Status: new | Priority: major
Milestone: sage-7.3 | Component: pickling
Keywords: | Merged in:
Authors: Andrey Novoseltsev | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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To fix unpickling of old objects it is necessary to know both module and
callable. At the moment module may be invisible:
{{{
sage: load('http://rlmiller.org/de_codes/get_code.php?id=16_08')
...
/home/novoselt/sage/src/sage/structure/sage_object.pyx in
sage.structure.sage_object.unpickle_global
(build/cythonized/sage/structure/sage_object.c:12911)()
1323 mod = sys_modules.get(module)
1324 if mod is not None:
-> 1325 return getattr(mod, name)
1326 try:
1327 __import__(module)
AttributeError: 'module' object has no attribute
'unpickle_FiniteField_prm'
}}}
After the fix:
{{{
sage: load('http://rlmiller.org/de_codes/get_code.php?id=16_08')
...
ImportError: cannot import unpickle_FiniteField_prm from sage.rings.ring,
call register_unpickle_override('sage.rings.ring',
'unpickle_FiniteField_prm', ...) to fix this
}}}
--
Ticket URL: <https://trac.sagemath.org/ticket/21065>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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