Python decorator not executing

Question

I am working on a decorator to register functions easier in my app, so I made a "do twice" decorator to test if i understood decorators correctly. I tried doing it, but it didn't work. Could someone help me?

My code (decorator.py):

def do_twice(func):
    def wrapper_do_twice():
        func()
        func()
    return wrapper_do_twice

My code (main.py):

from decorator import do_twice


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

I expected the function to say_whee() to be executed twice and give the output

Whee! 
Whee!

But there was no output.

Answer 1

If that is your full main.py you never called the function say_whee(). You should call it afterwards either directly or in a if __name__ == '__main__' block:

from decorator import do_twice


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

say_whee()

or

from decorator import do_twice


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

if __name__ == "__main__":
    say_whee()