Comment #4 on issue 1312 by danielstefanmader: provide a way to calculate
the constant coefficient of a polynomial
http://code.google.com/p/sympy/issues/detail?id=1312
Thank you for the quick reply!
Yet, it still doesn't work for me, maybe because the [S(1)] statement
returns an error:
In [1]: import sympy
In [2]: sympy.var('a b c x')
Out[2]: (a, b, c, x)
In [3]: f = a*x**2 + b*x + c
In [4]: sol=sympy.collect(f,x,evaluate=False)
In [5]: sol[x**2]
Out[5]: a
In [6]: sol[x]
Out[6]: b
In [7]: sol[1]
---------------------------------------------------------------------------
KeyError Traceback (most recent call last)
/home/mader/<ipython console> in <module>()
KeyError: 1
In [8]: sol[0]
---------------------------------------------------------------------------
KeyError Traceback (most recent call last)
/home/mader/<ipython console> in <module>()
KeyError: 0
In [9]: sol=sympy.collect(f,x,evaluate=False)[S(1)]
---------------------------------------------------------------------------
NameError Traceback (most recent call last)
/home/mader/<ipython console> in <module>()
NameError: name 'S' is not defined
Any help or hint is deeply appreciated!
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