TypeError:无法比较原始偏移和知道偏移的日期时间 [英] TypeError: cant compare offset-naive and offset-aware datetimes

问题描述

我从电子邮件中获取datetime对象，然后尝试将其与datetime.now进行比较

I get datetime object from email message and then I try to compare it with datetime.now

然后我看到此错误

datetime.now()> datetime.strptime('Fri，31 Jan 2020 09:59:34 +0000(UTC)'，％a，％d％b％Y％H:％M:％S％z(％Z)"

datetime.now() > datetime.strptime('Fri, 31 Jan 2020 09:59:34 +0000 (UTC)', "%a, %d %b %Y %H:%M:%S %z (%Z)"

TypeError:无法比较原始偏移日期和知道偏移的日期时间

TypeError: can't compare offset-naive and offset-aware datetimes

如何解决?

推荐答案

只要将偏移天真( datetime.now()无时区信息)与可感知偏移的值进行比较，就会发生这种情况(UTC)时间.Python默认情况下对时区的支持不佳.即使您使用 datetime.utcnow()从技术上进行比较，也只会返回您的UTC时间，但仍然具有幼稚的时区.

This will happen any time you compare an offset-naive (datetime.now() No Timezone info) to an offset-aware (UTC) time. Python has poor timezone support by default. Even if you used datetime.utcnow() to compare this technically just returns you the UTC time but still has a naive timezone.

我的建议是安装 pytz 软件包并执行以下操作:

My suggestion is to install the pytz package and do:

import pytz

datetime.now().replace(tzinfo=pytz.UTC) > \
    datetime.strptime('Fri, 31 Jan 2020 09:59:34 +0000 (UTC)',
                      "%a, %d %b %Y %H:%M:%S %z (%Z)")

有关更多参考，请参见: https://docs.python.org/3/library/datetime.html#datetime.datetime.utcnow

For further reference see: https://docs.python.org/3/library/datetime.html#datetime.datetime.utcnow

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