I'm enjoying exploring this package. Thank you!
I have a question about the "best" way or "standard practice" for
helping sympy simplify expressions.
My output from solving a linear system looks like a quotient with many
terms in the top that multiply
the denominator and thus could be simplified. I'd like to be able to
simplify those terms.
Here's a simple example:
>>> from symp.abc import *
>>> div=1/(a+b)
>>> expr=(a+a*r+b*r)*div
>>> print expr
(a+a*r+b*r)/(a+b)
I'd like to present this as: a/(a+b) + r or similar
Here's my solution:
>>> bplusa=sympy.Symbol('bplusa')
>>> tmp=sympy.expand(expr.subs(b,bplusa-a))
>>> print tmp
r + a/bplusa
>>> print tmp.subs(bplusa,b+a)
r + a/(a+b)
Is this a reasonable approach? Do others have a better way to do
this--especially one that doesn't rely on knowledge of what the
denominator is so it can be automated?
Thanks,
Dan
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