#10130: Revamp __hash__, __cmp__ and __richcmp__
---------------------------+------------------------------------------------
Reporter: roed | Owner: robertwb
Type: enhancement | Status: new
Priority: major | Milestone: sage-4.7
Component: coercion | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by nthiery):
Just a quick note: for parents that use UniqueRepresentation, the hash is
given by the id of the object; one can't be much faster (except that
UniqueRepresentation is not Cython'ed yet):
{{{
F = CombinatorialFreeModule(QQ,QQ)
sage: F.__hash__()
98169392
sage: id(F)
98169392
}}}
Other than that, I am all for improvements in this direction, because at
this stage I am still confused about what I should do when I want to
implement a partially ordered set in Python. Besides it would be best if
it was possible to implement such partial orders in categories (remember
that element methods defined in categories are overridden by methods
defined in concrete classes like Element).
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10130#comment:4>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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