#20185: Upgrade to SymPy-1.0
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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: |
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Comment (by tscrim):
With this branch, we have:
{{{
sage: import sympy
sage: u = sympy.Function('u'); n = sympy.Symbol('n', integer=True)
sage: x = int(3)
sage: x*u(n)
3*u(n)
sage: sympy.sympify(x*u(n))
3*u(n)
sage: sympy.sympify(x*u(n), evaluate=False)
3*u(n)
sage: x = 3._sympy_()
sage: sympy.sympify(x*u(n), evaluate=False)
3*u(n)
}}}
However, I think this is the problem:
{{{
sage: type(3*u(n))
<type 'sage.symbolic.expression.Expression'>
sage: type(u(n)*3)
<class 'sympy.core.mul.Mul'>
sage: x = int(3)
sage: type(x*u(n))
<class 'sympy.core.mul.Mul'>
sage: type(u(n)*x)
<class 'sympy.core.mul.Mul'>
}}}
So it is probably something on our end.
--
Ticket URL: <http://trac.sagemath.org/ticket/20185#comment:15>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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