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Python时间,日期,时间戳之间转换

2018年04月13日 ⁄ 综合 ⁄ 共 2042字 ⁄ 字号 评论关闭

转自:http://www.2cto.com/kf/201401/276088.html

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,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

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