converter.py 文件源码

def _pre_TIMESTAMP_LTZ_to_python(self, value, ctx):
        """
        TIMESTAMP LTZ to datetime

        This takes consideration of the session parameter TIMEZONE if
        available. If not, tzlocal is used
        """
        microseconds, fraction_of_nanoseconds = \
            self._extract_timestamp(value, ctx)
        tzinfo_value = self._get_session_tz()

        try:
            t0 = ZERO_EPOCH + timedelta(seconds=(microseconds))
            t = pytz.utc.localize(t0, is_dst=False).astimezone(tzinfo_value)
            return t, fraction_of_nanoseconds
        except OverflowError:
            logger.debug(
                "OverflowError in converting from epoch time to "
                "timestamp_ltz: %s(ms). Falling back to use struct_time."
            )
            return time.gmtime(microseconds), fraction_of_nanoseconds