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

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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,microseconds6.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