decorator.py

def my_decorator(func):
    def wrapper():
        print("Something is happening before the function is called.")
        func()
        print("Something is happening after the function is called.")
    return wrapper

@my_decorator
def say_whee():
    print("Whee!")

say_whee() # All of the above is the same as the next code chunk

"""def my_decorator(func):
    def wrapper():
        print("Something is happening for the function is called.")
        func()
        print("Something is happening after the funciton is called.")
    return wrapper

def say_whee():
    print("Whee!")


say_whee = my_decorator(say_whee)

say_whee()"""



""" # WHY DOES THIS NOT WORK
from datetime import datetime

def not_during_the_night(func):
    def wrapper():
        if 7 <= datetime.now().hour < 22:
            func()
        else:
            pass # Hush, the neighbors are asleep.
        return wrapper

def say_whee():
    print("Whee!")

say_whee = not_during_the_night(say_whee)

say_whee()"""