lambda: The functools library contains many items that allow you
to make the most out of lambda functions. A common example
is the reduce function. We'll show a demonstration below.
from functools import reduce
numbers = [1, 2, 3, 4, 5]
# sum via reduce
reduce(lambda x, y: x + y, numbers)
# prod via reduce
reduce(lambda x, y: x * y, numbers)
Note that reduce tells us what we are doing while the
lambda function tells us how we are doing it.