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我有一个 UTC 时间戳和一个时区偏移时间戳(都以毫秒为单位):

utc_time = 1394452800000
timezoneoffset = -14400000

如果我想得到datetime我会做的:

print datetime.utcfromtimestamp(utc_time/1000)
>>>2014-03-10 12:00:00

如何本地化此日期时间,但最终对象也可以感知时区?

如果我除以timezoneoffset,-14400000/(3600*1000) = -4(小时)。所以最终的输出应该是:

>>>2014-03-10 08:00:00-04:00

我的尝试:

from pytz import timezone
from dateutil.tz import tzoffset

utc_time = 1394452800000
timezoneoffset = -14400000

tzinfooff = tzoffset(None, timezoneoffset/1000)

print timezone(tzinfooff).localize( datetime.utcfromtimestamp(utc_time/1000) )

>>>Traceback (most recent call last):
  File "/Users/dionysis_lorentzos/Desktop/cmdline copy.py", line 25, in <module>
    print timezone(tzinfo2).localize( datetime.utcfromtimestamp(time/1000) ).isoformat()
  File "/usr/local/lib/python2.7/site-packages/pytz/__init__.py", line 162, in timezone
    if zone.upper() == 'UTC':
AttributeError: 'tzoffset' object has no attribute 'upper'
4

2 回答 2

5

您只需要使用dateutil.tz.tzoffset()type ; pytz.timezone只接受名称,而不接受dateutil.tz对象。

.localize()方法仅适用于-supplied 时区,因为它们也包含历史偏移量,并且需要更加小心pytz地将它们应用于对象。datetime.replace()

如果时间戳是 UTC 中的 UNIX 纪元值,则使用fromtimestap时区作为第二个参数:

>>> print datetime.fromtimestamp(utc_time/1000, tzinfooff)
2014-03-10 08:00:00-04:00

或者您可以使用 UTC 从 UTC翻译datetime.astimezone()

>>> from dateutil.tz impor tzutc
>>> dt_utc = datetime.utcfromtimestamp(utc_time/1000).replace(tzinfo=tzutc())
>>> print dt_utc.astimezone(tzinfooff)
2014-03-10 08:00:00-04:00
于 2014-03-10T16:00:21.733 回答
1

要将 POSIX 时间戳转换为由其 utc 偏移量指定的时区中的时区感知日期时间对象,您可以创建感知 utc 日期时间对象并将其转换为固定偏移时区:

from datetime import datetime

utc_dt = datetime.fromtimestamp(utc_time * 1e-3, utc)
dt = utc_dt.astimezone(FixedOffset(timezoneoffset * 1e-3 / 60, None))

print(dt.isoformat(' '))
# -> 2014-03-10 08:00:00-04:00

其中utcFixedOffsetdatetime文档中定义:

from datetime import tzinfo, timedelta

class FixedOffset(tzinfo):
    """Fixed offset in minutes east from UTC."""

    def __init__(self, offset, name):
        self.__offset = timedelta(minutes = offset)
        self.__name = name

    def utcoffset(self, dt):
        return self.__offset

    def tzname(self, dt):
        return self.__name

    def dst(self, dt):
        return timedelta(0)

utc = FixedOffset(0, "UTC")
于 2014-03-17T13:46:11.327 回答