win32timezone.py 文件源码

def local(class_):
        """Returns the local time zone as defined by the operating system in the
        registry.
        >>> localTZ = TimeZoneInfo.local()
        >>> now_local = datetime.datetime.now(localTZ)
        >>> now_UTC = datetime.datetime.utcnow()
        >>> (now_UTC - now_local) < datetime.timedelta(seconds = 5)
        Traceback (most recent call last):
        ...
        TypeError: can't subtract offset-naive and offset-aware datetimes

        >>> now_UTC = now_UTC.replace(tzinfo = TimeZoneInfo('GMT Standard Time', True))

        Now one can compare the results of the two offset aware values
        >>> (now_UTC - now_local) < datetime.timedelta(seconds = 5)
        True
        """
        code, info = TimeZoneDefinition.current()
        # code is 0 if daylight savings is disabled or not defined
        #  code is 1 or 2 if daylight savings is enabled, 2 if currently active
        fix_standard_time = not code
        # note that although the given information is sufficient to construct a WinTZI object, it's
        #  not sufficient to represent the time zone in which the current user is operating due
        #  to dynamic time zones.
        return class_(info, fix_standard_time)