raymondng76

# Decorators using the @ symbol ##########

def double_args(func):
    def wrapper(a, b):
        return func(a * 2, b * 2) # Modify input arguments before passing to requested function
    return wrapper

@double_args # This is to indicate the decorators is used on the multiple function
def multiple(a, b):
    return a * b

raymondng76

# Memoize example which stores results for fast look ups

import time

def memoize(func):
    cache = {}
    def wrapper(*args, **kwargs):
        if (args, kwargs) not in cache:
            cache[(args, kwargs)] = func(*args, **kwargs)
        return cache[(args, kwargs)]