15. Functools Module

The functools module provides higher-order functions for working with other functions.

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Common Functions

from functools import lru_cache, partial, reduce

@lru_cache(maxsize=None)
def fib(n):
    if n < 2: return n
    return fib(n-1) + fib(n-2)

print(fib(10))

def add(a, b): return a + b
add5 = partial(add, 5)
print(add5(10))

nums = [1, 2, 3, 4]
print(reduce(lambda x, y: x + y, nums))

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Wrap-Up

• functools offers caching, partial functions, reducing, and more.