Question

如何在不使用pytz.timezone()方法的情况下从localize()函数中仅获取 UTCOFFSET 值？

例如： pytz.timezone('Asia/Calcutta')给出：

DstTzInfo 'Asia/Calcutta' LMT+5:53:00 STD

在这里，我想只获得 LMT + 5:53 作为价值。

Answer 1

您遇到的问题并不像从pytz.timezone对象获取UTCOFFSET那么简单，因为答案取决于您何时讨论。

例如，如果我想立即知道中心时区（美国）的UTCOFFSET ，答案是GMT-6。但如果我们在夏令时，答案就是GMT-5。所以什么时候重要！

我使用这样的东西在标准时间内获取每个时区的tzinfo对象。从那里，我认为你可以获取你想要的tzinfo属性。

def getPytzInSTD(tname):
    """
    This returns a pytz timezone object normalized to standard time for the zone requested.
    If the zone does not follow DST or a future transition time cannot be found, it normalizes to NOW instead.

    :param tname:  Proper timezone name found in the tzdatabase. example: "US/Central"
    """

    # This defaults to the STD time for the zone rather than current time which could be DST
    tzone = pytz.timezone(tname)
    NOW = datetime.now(tz=pytz.UTC)
    std_date = NOW
    hasdst = False
    try:
        #transitions are in UTC.  They need to be converted to localtime once we find the correct STD transition.
        for utcdate, info in zip(tzone._utc_transition_times, tzone._transition_info):
            utcdate = utcdate.replace(tzinfo=pytz.UTC)
            utcoffset, dstoffset, tzname = info
            if dstoffset == ZERO:
                std_date = utcdate
            if utcdate > NOW:
                hasdst = True
                break
    except AttributeError:
        std_date = NOW
    if not hasdst:
        std_date = NOW
    std_date = tzone.normalize(std_date)
    return std_date.tzinfo

如何从pytz时区获得utcoffset值？

1 个答案: