def test_reduceby_product(data, groups):
keyfunc = lambda x: x % 2 == 0
reducefunc = lambda x, y: x * y
generator = utils.reduceby(data, keyfunc, reducefunc, 1)
assert list(generator) == groups
def test_reduceby_product(data, groups):
keyfunc = lambda x: x % 2 == 0
reducefunc = lambda x, y: x * y
generator = utils.reduceby(data, keyfunc, reducefunc, 1)
assert list(generator) == groups
def test_reduceby_sum(data, groups):
keyfunc = lambda x: x // 10
reducefunc = lambda x, y: x + y
generator = utils.reduceby(data, keyfunc, reducefunc, 0)
assert list(generator) == groups
def test_reduceby_sum(data, groups):
keyfunc = lambda x: x // 10
reducefunc = lambda x, y: x + y
generator = utils.reduceby(data, keyfunc, reducefunc, 0)
assert list(generator) == groups