Python time, date, time stamp conversion between

1 .将字符串的时间转换为时间戳      方法:          a = "2013-10-10 23:40:00"          将其转换为时间数组          import time          timeArray = time.strptime(a, "%Y-%m-%d %H:%M:%S" )      转换为时间戳:      timeStamp = int (time.mktime(timeArray))      timeStamp == 1381419600 2 .字符串格式更改      如a = "2013-10-10 23:40:00" ,想改为 a = "2013/10/10 23:40:00"      方法:先转换为时间数组,然后转换为其他格式      timeArray = time.strptime(a, "%Y-%m-%d %H:%M:%S" )      otherStyleTime = time.strftime( "%Y/%m/%d %H:%M:%S" , timeArray) 3 .时间戳转换为指定格式日期:      方法一:          利用localtime()转换为时间数组,然后格式化为需要的格式,如          timeStamp = 1381419600          timeArray = time.localtime(timeStamp)          otherStyleTime = time.strftime( "%Y-%m-%d %H:%M:%S" , timeArray)          otherStyletime == "2013-10-10 23:40:00"      方法二:          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" 4 .获取当前时间并转换为指定日期格式      方法一:          import time          获得当前时间时间戳          now = int (time.time())  ->这是时间戳          转换为其他日期格式,如: "%Y-%m-%d %H:%M:%S"          timeArray = time.localtime(timeStamp)          otherStyleTime = time.strftime( "%Y-%m-%d %H:%M:%S" , timeArray)      方法二:          import datetime          获得当前时间          now = datetime.datetime.now()  ->这是时间数组格式          转换为指定的格式:          otherStyleTime = now.strftime( "%Y-%m-%d %H:%M:%S" ) 5 .获得三天前的时间      方法:          import time          import datetime          先获得时间数组格式的日期          threeDayAgo = (datetime.datetime.now() - datetime.timedelta(days = 3 ))          转换为时间戳:              timeStamp = int (time.mktime(threeDayAgo.timetuple()))          转换为其他字符串格式:              otherStyleTime = threeDayAgo.strftime( "%Y-%m-%d %H:%M:%S" )      注:timedelta()的参数有:days,hours,seconds,microseconds 6 .给定时间戳,计算该时间的几天前时间:      timeStamp = 1381419600      先转换为datetime      import datetime      import time      dateArray = datetime.datetime.utcfromtimestamp(timeStamp)      threeDayAgo = dateArray - datetime.timedelta(days = 3 )      参考 5 ,可以转换为其他的任意格式了

Python time, date, time stamp conversion between