仅比较日期时间中的时间部分 - Python
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/15105112/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Compare only time part in datetime - Python
提问by Amit K.
I want to compare only time part in datetime. I have different dates with only time field to compare. Since dates are different and only time part i want to consider So i think creating two datetime object will not help. my string as
我只想比较日期时间中的时间部分。我有不同的日期，只有时间字段可以比较。由于日期不同并且我只想考虑时间部分所以我认为创建两个 datetime 对象将无济于事。我的字符串作为
start="22:00:00"
End="03:00:00"
Tocompare="23:30:00"
Above are strings when i convert them with datetime as
以上是我将日期时间转换为字符串时的字符串
dt=datetime.strptime(start,"%H:%M:%S")
it gives
它给
1900-01-01 22:00:00
which is default date in python.
So i need to avoid all this and want only time part. I simply need to check does my Tocomparefalls between startand End
这是python中的默认日期。所以我需要避免这一切，只想要时间部分。我只需要检查我是否Tocompare落在start和End
回答by jarmod
Compare their times using datetime.time().
使用datetime.time()比较它们的时间。
回答by Yueyoum
import datetime
start = datetime.datetime.strptime(start, '%H:%M:%S')
start = datetime.time(start.hour, start.minute,start.second)
tocompare = datetime.datetime.strptime(tocompare, '%H:%M:%S')
tocompare = datetime.time(tocompare.hour, tocompare.minute, tocompare.second)
start > tocompare # False
回答by matt
Just call the .time()methodof the datetimeobjects to get their hours, minutes, seconds and microseconds.
只需调用.time()方法的的datetime对象，以得到他们的小时，分钟，秒和毫秒。
dt = datetime.strptime(start,"%H:%M:%S").time()
