# lru_cache.py

# lru_cache.py

from functools import lru_cache

@lru_cache(maxsize=None) # lru = "least recently used"
def increment(num):
    print("Running 1000 lines of code")
    return num

print(increment(1))
print(increment(2))
print(increment(3))
print(increment(2))
print(increment(1))
print(increment(3))

'''
Running 1000 lines of code
1
Running 1000 lines of code
2
Running 1000 lines of code
3
2
1
3
'''