为什么知道时区的日期时间的tzinfo不等于时区？ [英] Why a timezone aware datetime's tzinfo does not equal the timezone?

问题描述

>>> import pytz
>>> tz = pytz.timezone('America/Chicago')
>>> dt_naive = datetime(year=2017, month=6, day=6)
>>> dt_aware = tz.localize(dt_naive)
>>> dt_aware.tzinfo == tz
False

这些差异的原因是什么？

What's the reason for these to differ?

>>> dt_aware.tzinfo
<DstTzInfo 'America/Chicago' CDT-1 day, 19:00:00 DST>
>>> tz
<DstTzInfo 'America/Chicago' LMT-1 day, 18:09:00 STD>

推荐答案

从<$ c $确定时区的键c> pytz 是您创建对象时传递的字符串：'America / Chicago'。该键可通过 .zone 属性获得。

The key that determines the timezone from pytz is the string you passed to create the object: 'America/Chicago'. That key is available through the .zone attribute.

>>> tz = pytz.timezone('America/Chicago')
>>> dt_naive = datetime(year=2017, month=6, day=6)
>>> dt_aware = tz.localize(dt_naive)
>>> dt_aware.tzinfo == tz
False
>>> tz.zone
'America/Chicago'
>>> dt_aware.tzinfo.zone == tz.zone
True

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