Python Language Get an accumulated sum of numbers in an iterable


Example

Python 3.x3.2

accumulate yields a cumulative sum (or product) of numbers.

>>> import itertools as it
>>> import operator

>>> list(it.accumulate([1,2,3,4,5]))
[1, 3, 6, 10, 15]

>>> list(it.accumulate([1,2,3,4,5], func=operator.mul)) 
[1, 2, 6, 24, 120]