function_timer.py

def timer(f):
    """
    Decorator to time the execution of a function
    :param f: The function to be timed
    :return: The time in seconds that it took for the function to execute
    """
    def timing_function():
        ts = time()
        f()
        te = time()
        total_time = (te - ts)
        print '\n', "Exceution time :  ", total_time, '\n'
    timing_function.__name__ = f.__name__
    return timing_function
    
    
    # Sample usage
    @timer
    def calc():
        i = 0
        while i < 1000:
            i += 1