On Tue, Nov 25, 2008 at 4:38 PM, Zoho Vignochi <[EMAIL PROTECTED]> wrote:
>
> Hello:
>
> I am using sympy on debian unstable. The function coeff is not returning
> what I expect. Below is an example
>
>
> Python 2.5.2 console for SymPy 0.6.3
>
> These commands were executed:
>>>> from __future__ import division
>>>> from sympy import *
>>>> x, y, z = symbols('xyz')
>>>> k, m, n = symbols('kmn', integer=True)
>>>> f, g, h = map(Function, 'fgh')
>
> Documentation can be found at http://sympy.org/
>
> In [1]: p = -x/8 + x*y
>
> In [2]: p.coeff(x)
> Out[2]: 0 ****Here I expected -1/8 + y
>
> In [3]: p.coeff(-x)
> Out[3]: -y
>
> In [4]: p.coeff(y)
> Out[4]: x
>
> In [5]:
>
> Am I doing something silly?
No, you've found a bug, I made it:
http://code.google.com/p/sympy/issues/detail?id=1219
I am looking how to fix it now.
Ondrej
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