python实现的简单的计时器功能函数，python计时器函数,''' Simple T

python实现的简单的计时器功能函数，python计时器函数,''' Simple T

''' Simple Timing Function.This function prints out a message with the elapsed time from the previous call. It works with most Python 2.x platforms. The function uses a simple trick to store a persistent variable (clock) withoutusing a global variable.'''import timedef dur( op=None, clock=[time.time()] ):    if op != None:        duration = time.time() - clock[0]        print '%s finished. Duration %.6f seconds.' % (op, duration)    clock[0] = time.time()# Exampleif __name__ == '__main__':    import array    dur()   # Initialise the timing clock    opt1 = array.array('H')    for i in range(1000):        for n in range(1000):            opt1.append(n)    dur('Array from append')    opt2 = array.array('H')    seq = range(1000)    for i in range(1000):        opt2.extend(seq)    dur('Array from list extend')    opt3 = array.array('H')    seq = array.array('H', range(1000))    for i in range(1000):        opt3.extend(seq)    dur('Array from array extend')# Output:# Array from append finished. Duration 0.175320 seconds.# Array from list extend finished. Duration 0.068974 seconds.# Array from array extend finished. Duration 0.001394 seconds.