Decorators

decorators1.py

from functools import wraps

def hello(func):
    @wraps(func)  # fetch attributes from the original function
    def proxy(*args, **kwargs):
        print("Decorator Action")
        return func(*args, **kwargs)
    return proxy

@hello
def add(a, b):
    return a + b

decorators2.py

def say(text):
    def _say(func):
        def __say(*args, **kwargs):
            print(text)
            return func(*args, **kwargs)
        return __say
    return _say

@say('hello')
def sub(a,b):
    return a-b

decorators3.py

class C():
    @staticmethod  # This is a decorator necessary that func() can be called
    def func():
        print('Hallo')

c = C()
c.func()