本文實例講述了python實現(xiàn)簡單的計時器功能函數(shù)。分享給大家供大家參考。具體如下：
此函數(shù)通過python實現(xiàn)了一個簡單的計時器動能：
- ''' 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) without
- using a global variable.
- '''
- import time
- def 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()
- # Example
- if __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.
希望本文所述對大家的Python程序設計有所幫助。
