Python Version 2.5 and later The functools module provides tools for adapting or extending functions and other callable objects, without completely rewriting them. 3.1.1 Decorators The primary tool ...

lru_cache basics To memoize a function in Python, we can use a utility supplied in Python’s standard library—the functools.lru_cache decorator. lru_cache isn’t hard to use.

This is the output when run: $ python decorator_test.py Function calculate_squares being called at 2018-08-23 12:39:02.112904 Took 2.5019338130950928 seconds Dealing with parameters ...