python中给函数计时的简单方法

这是在cs231n例程中看到的操作，学习了

   def time_function(f, *args):
    """
    Call a function f with args and return the time (in seconds) that it took to execute.
    """
    import time
    tic = time.time()
    f(*args)
    toc = time.time()
    return toc - tic