#15718: Implement the __init_extra__ protocol of categories for Cython classes.
------------------------------+------------------------
Reporter: nthiery | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.1
Component: categories | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
------------------------------+------------------------
Comment (by nbruin):
Replying to [comment:7 SimonKing]:
> I just tested: When one empties the coercion cache and the
coerce_from_list, then calling `C.__init_extra__.__func__(R)` will fill it
again, which is its purpose. So, it works without binding.
Well ... that works when `C.__init_extra__` is an unbound method that has
a `__func__` attribute. Likely all unbound methods do, so you've probably
dealt with the case that `__init_extra__` is an unbound method. But
attributes aren't necessarily! I think only unbound methods bind when
called as attributes on instances. Other objects just get called. But
that's a case you should test for if you want this to be properly
compatible with python's inheritance. Unbound methods aren't the only
things that lead to callable attributes on instances.
--
Ticket URL: <http://trac.sagemath.org/ticket/15718#comment:8>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at http://groups.google.com/group/sage-trac.
For more options, visit https://groups.google.com/groups/opt_out.
