Function Caching

from functools import lru_cache
@lru_cache(maxsize=10)
def add(a, b):
    print('add method called')
    return a+b
print(add(7, 4))
add method called
11

print(add(7, 4))
11

print(add(5, 2))
add method called
7

print(add(5, 2))
7

# clear cache
add.cache_clear()
print(add(5, 2))
add method called
7

print(add(5, 2))
7