Comment #12 on issue 1598 by asmeurer: New polynomials manipulation module
http://code.google.com/p/sympy/issues/detail?id=1598
It looks like factor also chokes on reals, and you have a bug:
>>> factor(x*(y + z)**(1/2)*(1 + y))
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "./sympy/polys/polytools.py", line 1839, in factor
F = Poly(f, *gens, **args)
File "./sympy/polys/polytools.py", line 435, in __new__
result = _init_poly_from_basic(rep, *gens, **args)
File "./sympy/polys/polytools.py", line 367, in _init_poly_from_basic
rep, gens = dict_from_basic(ex, **args)
File "./sympy/polys/polyutils.py", line 168, in dict_from_basic
return _dict_from_basic_no_gens(ex, **args)
File "./sympy/polys/polyutils.py", line 123, in _dict_from_basic_no_gens
base, exp = _analyze_power(*factor.as_Pow())
File "./sympy/polys/polyutils.py", line 65, in _analyze_power
raise PolynomialError("%s is not a valid polynomial term" % term)
NameError: global name 'term' is not defined
It would be nice if factor just returned the expression if it can't do it,
instead of raising PolynomialError. That
way, you don't have to have a try block every time you want to factor
something.
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