2.py

def counter(func):
    """
    A decorator that counts and prints the number of times a function has been executed
    """
    def wrapper(*args, **kwargs):
        wrapper.count = wrapper.count + 1
        res = func(*args, **kwargs)
        print '{0} has been used: {1}x'.format(func.__name__, wrapper.count)
        return res
    wrapper.count = 0
    return wrapper