itertools.accumulate() versus functools.reduce()

Question

In Python 3.3, itertools.accumulate(), which normally repeatedly applies an addition operation to the supplied iterable, can now take a function argument as a parameter; this me

Answer 1

You can see in the documentation what the difference is. reduce returns a single result, the sum, product, etc., of the sequence. accumulate returns an iterator over all the intermediate results. Basically, accumulate returns an iterator over the results of each step of the reduce operation.