#17958: implement declare_var, deprecate (None)var
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Reporter: rws | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.6
Component: symbolics | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by slabbe):
Related to this discussion, note that there is another (strange) way to
declare variables in Sage that currently works:
{{{
sage: ,var x a b c
(x, a, b, c)
sage: type(a)
<type 'sage.symbolic.expression.Expression'>
}}}
Apparently, it is ipython that provides this. I learn about the existence
of this when I recently read the
[http://en.wikipedia.org/wiki/Sage_(mathematics_software) wikipedia page
of Sage]:
{{{
x, a, b, c = var('x, a, b, c')
# Note that IPython also supports a faster way to do this, by calling
# this equivalent expression starting with a comma:
# ,var x a b c
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/17958#comment:68>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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