用python 计时器怎么做,

发布网友发布时间：2022-04-26 22:52

共3个回答

热心网友时间：2022-04-18 03:01

用python实现计时器功能，代码如下：

''' 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 r( op=None, clock=[time.time()] ):
  if op != None:
    ration = time.time() - clock[0]
    print '%s finished. Duration %.6f seconds.' % (op, ration)
  clock[0] = time.time()
# Example
if __name__ == '__main__':
  import array
  r()  # Initialise the timing clock
  opt1 = array.array('H')
  for i in range(1000):
    for n in range(1000):
      opt1.append(n)
  r('Array from append')
  opt2 = array.array('H')
  seq = range(1000)
  for i in range(1000):
    opt2.extend(seq)
  r('Array from list extend')
  opt3 = array.array('H')
  seq = array.array('H', range(1000))
  for i in range(1000):
    opt3.extend(seq)
  r('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.

热心网友时间：2022-04-18 04:19

from sys import argv
h = {"+":int.__add__,"-":int.__sub__,"*":int.__mul__,"/":int.__div__}
print rece(h[argv[2]],[int(argv[1]),int(argv[3])])

最简单的。。。

python test.py 3 * 9

热心网友时间：2022-04-18 05:54

汗。
原来是计算器.....