example-code-2e/09-closure-deco/fibo_demo_cache.py

import functools

from clockdeco import clock


@functools.cache  # <1>
@clock  # <2>
def fibonacci(n):
    if n < 2:
        return n
    return fibonacci(n - 2) + fibonacci(n - 1)


if __name__ == '__main__':
    print(fibonacci(6))