Hmm. I have no idea of what you want, but...
In [32]: A = IndexedBase('A')
In [33]: n=Symbol('n', integer=True)
In [34]: Sum(A[n],(n,0,2))
Out[34]:
2
___
╲
╲ A[n]
╱
╱
‾‾‾
n = 0
In [35]: _.doit()
Out[35]: A[0] + A[1] + A[2]
On Monday, August 4, 2014 9:30:38 AM UTC+4, Nova Munch wrote:
>
> hello.
>
> i have a tuple of symbols, a where a is (a_0, a_1, a_2, a_3, a_4)
>
> i want to call:
> >> summation(a[i], (i, 0, 4))
>
> but python returns a TypeError that the indices must be integers, not
> Symbol.
>
> this is more of a python constraint instead of Sympy. but is there some
> workaround to it?
>
> thanks folks!
>
>
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