python时间戳是啥意思？

import time

a = "2013-10-10 23:40:00"

# 将其转换为时间数组

timeArray = time.strptime(a,"%Y-%m-%d %H:%M:%S")

# 转换为时间戳

timeStamp = int(time.mktime(timeArray))

timeStamp == 1381419600

import time

timeStamp = 1381419600

timeArray = time.localtime(timeStamp)

otherStyleTime = time.strftime("%Y-%m-%d %H:%M:%S",timeArray)

otherStyletime == "2013-10-10 23:40:00"

import datetime

timeStamp = 1381419600

dateArray = datetime.datetime.utcfromtimestamp(timeStamp)

otherStyleTime = dateArray.strftime("%Y-%m-%d %H:%M:%S")

otherStyletime == "2013-10-10 23:40:00"