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October 29, 2015 09:01
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python date convert
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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 |
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