记录分析python程序运行时间的几种方法

方法1

import datetime
import time

starttime = datetime.datetime.now()

#long running
time.sleep(2)

endtime = datetime.datetime.now()

str="run time: %d seconds" % ((endtime - starttime).seconds)
print(str)

方法2

import datetime
import time

start = time.time()

time.sleep(2)

end = time.time()

str="run time: %d seconds" % ( end-start)
print(str)

方法3

import datetime
import time

start = time.clock()

time.sleep(2)

end = time.clock()

str="run time: %d seconds" % ( end-start)
print(str)