Python · functools and standard library

functools.reduce()

Folds an iterable into one value. Prefer sum or a loop when clearer.

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Syntax

reduce(function, iterable, initial)

Example

Open in the lab

from functools import reduce
print(reduce(lambda acc, n: acc * n, [1, 2, 3, 4], 1))

Reference pages are the quick answer. The course explains the why, shows the full example and ends with a challenge.