Comment #2 on issue 1714 by [email protected]: some sum problems
http://code.google.com/p/sympy/issues/detail?id=1714
This is out-of-date. Currently,
In [1]: sum(2*f(k),(k,0,n))
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
/home/junk/src/sympy/bin/<ipython-input-1-9dc1d68975d7> in <module>()
----> 1 sum(2*f(k),(k,0,n))
TypeError: 'Mul' object is not iterable
In [2]: sum(f(k)+1,(k,0,n))
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
/home/junk/src/sympy/bin/<ipython-input-2-17f15c3c5020> in <module>()
----> 1 sum(f(k)+1,(k,0,n))
TypeError: 'Add' object is not iterable
Changing this would require overriding the default behavior of
python's "sum()", which I think was something that was decided against.
Use Sum() and it's functions for manipulation and evaluation of summations.
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