#12978: conditionally_defined decorator for methods and other attributes
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Reporter: nthiery | Owner: jason
Type: enhancement | Status: new
Priority: major | Milestone: sage-
Component: misc | wishlist
Keywords: categories, | Resolution:
conditionally_defined | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: #15056 | Stopgaps:
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Comment (by SimonKing):
Replying to [comment:16 SimonKing]:
> At some point, I need to find out what class the default implementation
is defined for, so that one can get the non-default implementation by a
call to `super`. That's a problem. Currently, I go up the class hierarchy
and test whether the conditionally_defined instance is in the `__dict__`
of the class. But if the conditionally_defined instance is wrapped in a
different wrapper (e.g., a cached_method), then this way of determining
the class will fail.
>
> I wonder if Python gives this information automatically, when it invokes
`__get__`. To be investigated...
PS: In my current patch, I trust that the class that Python gives as an
argument to `__get__` is the class in which the object-to-be-bound is
found. It seems to work.
--
Ticket URL: <http://trac.sagemath.org/ticket/12978#comment:18>
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