Comment #3 on issue 2955 by smi...@gmail.com: Function to compute the
domain of a function
http://code.google.com/p/sympy/issues/detail?id=2955
FWIW, there is the denoms function in solvers that can help with this (I
wrote this earlier today but can't seem to locate it now):
>>> eq=(1+1/x)/(x-1)
>>> from sympy.solvers.solvers import denoms
>>> exclude = set()
>>> for d in denoms(eq):
... for s in solve(d):
... exclude.add(s)
...
>>> print exclude
set([1, 0])
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