如何在python中比较datetime对象？

如何解决如何在python中比较datetime对象？

好吧，从来没有像Python中的日期时间那么难。我有个时间my_time，这个时间在夏天总是需要增加2小时，而冬天则需要增加1小时。 my_time的正确时区是EET。现在，我正在尝试将其与start_time和end_time进行比较，但是执行if语句时，我仍然可以看到它仍在寻找'base'my_time。那怎么可能？

这是我的代码：

my_time = '20200907-07u00m00s' 
my_time = datetime.datetime.strptime(my_time,'%Y%m%d-%Hu%Mm%Ss')   
timezone= 'Europe/Amsterdam'
my_time = pytz.utc.localize(my_time).astimezone(pytz.timezone(timezone))

start_time = '202097060000'
start_time = datetime.datetime.strptime(start_time,'%Y%m%d%H%M%S')
start_time = pytz.utc.localize(start_time)

end_time = '202097080000'
end_time = datetime.datetime.strptime(end_time,'%Y%m%d%H%M%S')
end_time = pytz.utc.localize(end_time)

if my_time >= start_time and my_time <= end_time: 
    print('my_time IS between the start and end time')
else:
    print('my_time IS NOT between the start and end time')

收到的输出： my_time IS between the start and end time

我猜代码正在检查2020-09-07 07:00:00是否在2020-09-07 06:00:00和2020-09-07 08:00:00之间。

我的预期输出是该代码检查是否： 2020-09-07 09:00:00在2020-09-07 06:00:00和2020-09-07 08:00:00之间，这意味着它应该打印my_time IS NOT between the start and end time

解决方法

您可以获取本地化my_time值的UTC偏移量并将其添加到my_time中：

my_time = '20200907-07u00m00s' 
my_time = datetime.datetime.strptime(my_time,'%Y%m%d-%Hu%Mm%Ss')   

timezone= 'Europe/Amsterdam'
my_time_tz = pytz.utc.localize(my_time).astimezone(pytz.timezone(timezone))

timeDiff = my_time_tz.utcoffset().total_seconds()
print("UTC Offset: %s seconds" % timeDiff)
normalized_my_time = pytz.utc.localize(my_time+datetime.timedelta(seconds=timeDiff))

start_time = '202097060000'
start_time = datetime.datetime.strptime(start_time,'%Y%m%d%H%M%S')
start_time = pytz.utc.localize(start_time)

end_time = '202097080000'
end_time = datetime.datetime.strptime(end_time,'%Y%m%d%H%M%S')
end_time = pytz.utc.localize(end_time)

print(start_time,normalized_my_time,end_time)

if start_time <= normalized_my_time <= end_time: 
    print('my_time IS between the start and end time')
else:
    print('my_time IS NOT between the start and end time')

出局：

UTC Offset: 7200.0 seconds
2020-09-07 06:00:00+00:00 2020-09-07 09:00:00+00:00 2020-09-07 08:00:00+00:00
my_time IS NOT between the start and end time