#20185: Upgrade to SymPy-1.0
-------------------------------------+-------------------------------------
Reporter: rws | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-7.1
Component: packages: | Resolution:
standard | Merged in:
Keywords: | Reviewers:
Authors: Ralf Stephan | Work issues:
Report Upstream: N/A | Commit:
Branch: | 03912520043631024635c3d6d09b86743b6c411e
u/rws/upgrade_to_sympy_1_0 | Stopgaps:
Dependencies: |
-------------------------------------+-------------------------------------
Comment (by tscrim):
So it seems the issue is coming from the fact that in 0.7.6.1, we have
`type(parent(u)) is type` returning `False` before but with 1.0, it is
`True`. Which, AFAICS, is only involved in `discover_action`, but the
result is still a `None`.
{{{
sage: cm.discover_action(ZZ, parent(u(n)), operator.mul) # Same in
0.7.6.1
}}}
Although to be fair, I think we should test against `u(n)` since
parentheses get evaluated before `*`. In that case, I get the same result
in both versions:
{{{
sage: parent(u)
<class 'sympy.core.function.UndefinedFunction'>
sage: parent(u(n))
u
sage: steps,res = cm.analyse(ZZ, parent(u(n))); steps
['Will try _r_action and _l_action']
}}}
I'm thinking we will need someone who is much more familiar with the
coercion framework than I am.
--
Ticket URL: <http://trac.sagemath.org/ticket/20185#comment:19>
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 https://groups.google.com/group/sage-trac.
For more options, visit https://groups.google.com/d/optout.
