Learn python decorator samples

decorator_sample.py

def a_decorator_passing_arbitrary_arguments(function_to_decorate):
    
    def wrapper(*args, **kwargs):
        print "Do I have args?:"
        print args
        print kwargs
        function_to_decorate(*args, **kwargs)
    return wrapper

@a_decorator_passing_arbitrary_arguments
def function_with_no_argument():
    print "Python is cool, no argument here."

@a_decorator_passing_arbitrary_arguments
def function_with_arguments(a, b, c):
    print a, b, c

@a_decorator_passing_arbitrary_arguments
def function_with_named_arguments(a, b, c, platypus="Why not ?"):
    print "Do %s, %s and %s like platypus? %s" % \
        (a, b, c, platypus)

class Mary(object):
    def __init__(self):
        self.age = 31

    @a_decorator_passing_arbitrary_arguments
    def sayYourAge(self, lie = -3):
        print "I am %s, what do you think ?" % (self.age + lie)

def my_decorator(func):
    print "I'm a ordinary function."
    def wrapper():
        print "I'm a function returned by decorator."
        func()
    return wrapper

def lazzy_function():
    print "zzzzzzzz"



if __name__ == "__main__":
    print "__________1__________"
    function_with_no_argument()
    print "__________2__________"
    function_with_arguments(1, 2, 3)
    print "__________3__________"
    function_with_named_arguments("Bill", "Linux", "Steve", platypus = "Indeed!")
    print "__________4__________"
    m = Mary()
    m.sayYourAge()
    print "_____________________"
    decorated_function = my_decorator(lazzy_function)
    decorated_function()

    @my_decorator
    def haha():
        print "ahahahaha"