Decorator example

decorator.py

# Function Decorator
def Logged(f):
    def wrapper():
        print f.__name__
    return f

# Class Decorator
class decorator():
    def __init__(self, f):
        print "Initialzing decorator"
        self.f = f
        print "Exiting initiazation"

    # Because of class is not callable by itself, we add __call__ to be callable.
    def __call__(self, *args):
        print "Entering call"
        f = self.f(*args)
        print "Exiting call"
        return f

@Logged
def hola():
    print "Hola"

# Initailize decorator and Call decorator class
@decorator
def hello():
    print "Hello World"


if __name__ == '__main__':
    print "Class Decorator Started"
    hello()

    print "\nFunction Decorator Stared"
    hola()

Decorator example in python