class_decorator.py

class mydecorator(object):
    def __init__(self, times, repeats):
        self.times=times
        self.repeats=repeats
        self.a=1

    def __call__(self, func):
        # here, we just need to return a new function.  That new function will be what is actually stored in the name and run when I.
        def myfunc(*args, **kwargs):
            # *this* inner function is what is actually called
            # here I also print the result of calling the function we
            # are decorating
            print "calling decorated function: %d times"%self.a
            print func(*args, **kwargs)
            print "finished"
            self.a+=1
        return myfunc

@mydecorator(times=2,repeats=4)
def f(x): 
    return x**2

f(3)
f(5)
f(10)