python time

 计算程序运行时间

import time
start = time.clock()
time.sleep(5)
end = time.clock()
runtime = end - start

获得当前时间戳

import time
time.time()

import time
time.ctime()

 按自定义格式输出当前时间

import time
time.asctime()

import time
time.strptime('28/Jul/2013:04:33:29', '%d/%b/%Y:%X')

import time

time.strftime('%Y%m%d %H:%M:%S')

>>> time.strftime("%Y-%m-%d %H:%M:%S", time.localtime(time.time()))
'2015-03-25 13:49:24'

datetime

获取当前时间

datetime.datetime.now()

获取n天前时间

import datetime

(datetime.datetime.now() - datetime.timedelta(days = 100)).strftime("%Y-%m-%d")

时间差

字符串转时间戳

import time
time.striptime(string, "%Y-%m-%d %H:%M:%S")

时间差计算

t1 = '2015-03-23 19:04:37'
t2 = '2015-03-21 15:04:37'

dt1 = datetime.strptime(t1, "%Y-%m-%d %H:%M:%S")
dt2 = datetime.strptime(t2, "%Y-%m-%d %H:%M:%S")

d = dt1 - dt2 

days = d.days

seconds = d.seconds%60

minutes = (d.seconds/60)%60

hours = (d.seconds/3600)%24

时间差计算函数

from  datetime import *

def calTimeDelay(t1, t2, strip="%Y-%m-%d %H:%M:%S"):
    d = abs(datetime.strptime(t2, strip) - datetime.strptime(t1, strip))
    days = d.days
    seconds = d.seconds%60
    hours = (d.seconds/3600)%60
    minutes = (d.seconds/60)%60
    return days,hours,minutes,seconds

t1 = "2015-03-23 19:04:37"
t2 = "2015-03-21 13:04:37"

print calTimeDelay(t1, t2)

本文 由 cococo点点 创作，采用 知识共享 署名-非商业性使用-相同方式共享 3.0 中国大陆 许可协议进行许可。欢迎转载，请注明出处：
转载自：cococo点点 http://www.cnblogs.com/coder2012