I was just trying out sympy to try and make a few bits of hand-algebra
easier, and avoid mistakes, but am having some trouble.
I'm trying to factor out one variable, so tried (having set up a and b
as symbols):
factor(a*b+b, b)
And get:
Traceback (most recent call last):
File "<input>", line 1, in <module>
File "C:\Program Files\Python25\Lib\site-packages\sympy\polynomials
\wrapper.py", line 38, in factor
return Mul(*[ff.sympy_expr for ff in factor_.factor(f, var,
order)])
File "C:\Program Files\Python25\Lib\site-packages\sympy\polynomials
\factor_.py", line 182, in factor
denom, f = f.as_integer()
File "C:\Program Files\Python25\Lib\site-packages\sympy\polynomials
\base.py", line 467, in as_integer
raise PolynomialException("%s is no rational coefficient!" %
term[0])
PolynomialException: 1 + a is no rational coefficient!
Trying without the 2nd argument gives the result I expected, but I
want to specify the factor for a more complicated example where it
isn't clear.
Also, factor(a*b+b*c+a*c) seems to just hang on my computer. Can't
decide what to factor by?
It seems like I'm only trying simple stuff and it doesn't work! Have
I got the wrong idea here and am making some horrible
misunderstanding?
Thanks,
Tom
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