def astimezone_and_leap_second(self, tz):
        """Convert to a Python ``datetime`` and leap second in a timezone.

        Convert this time to a Python ``datetime`` and a leap second::

            dt, leap_second = t.astimezone_and_leap_second(tz)

        The argument ``tz`` should be a timezone from the third-party
        ``pytz`` package, which must be installed separately.  The date
        and time returned will be for that time zone.

        The leap second value is provided because a Python ``datetime``
        can only number seconds ``0`` through ``59``, but leap seconds
        have a designation of at least ``60``.  The leap second return
        value will normally be ``0``, but will instead be ``1`` if the
        date and time are a UTC leap second.  Add the leap second value
        to the ``second`` field of the ``datetime`` to learn the real
        name of the second.

        If this time is an array, then an array of ``datetime`` objects
        and an array of leap second integers is returned, instead of a
        single value each.

        """
        dt, leap_second = self.utc_datetime_and_leap_second()
        normalize = getattr(tz, 'normalize', None)
        if self.shape and normalize is not None:
            dt = array([normalize(d.astimezone(tz)) for d in dt])
        elif self.shape:
            dt = array([d.astimezone(tz) for d in dt])
        elif normalize is not None:
            dt = normalize(dt.astimezone(tz))
        else:
            dt = dt.astimezone(tz)
        return dt, leap_second
Convert to a Python ``datetime`` and leap second in a timezone.

        Convert this time to a Python ``datetime`` and a leap second::

            dt, leap_second = t.astimezone_and_leap_second(tz)

        The argument ``tz`` should be a timezone from the third-party
        ``pytz`` package, which must be installed separately.  The date
        and time returned will be for that time zone.

        The leap second value is provided because a Python ``datetime``
        can only number seconds ``0`` through ``59``, but leap seconds
        have a designation of at least ``60``.  The leap second return
        value will normally be ``0``, but will instead be ``1`` if the
        date and time are a UTC leap second.  Add the leap second value
        to the ``second`` field of the ``datetime`` to learn the real
        name of the second.

        If this time is an array, then an array of ``datetime`` objects
        and an array of leap second integers is returned, instead of a
        single value each.