在用Python编写程序时经常会遇到需要求解一个函数运行时间的情况，发现一个利用Python语言特性编写的比较巧妙的计算方法，这里记录和大家分享一下：

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