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renzon/sum_prod.py

Created November 12, 2018 13:13
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sum_prod.py
from itertools import zip_longest
def sum_prod(iter, iter2):
return sum(map(lambda tpl: tpl[0] * tpl[1], zip_longest(iter, iter2, fillvalue=1)))
def test_sum_prod():
assert 0 == sum_prod([], [])
assert 2 == sum_prod([2], [])
assert 6 == sum_prod([2], [3])
assert 11 == sum_prod([2], [3, 5])
assert 26 == sum_prod([2, 4], [3, 5])
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