Returns a construct for an array of line data.

def _get_line_array_construct(self):
        """ Returns a construct for an array of line data.
        """
        from_bus = integer.setResultsName("fbus")
        to_bus = integer.setResultsName("tbus")
        s_rating = real.setResultsName("s_rating") # MVA
        v_rating = real.setResultsName("v_rating") # kV
        f_rating = real.setResultsName("f_rating") # Hz
        length = real.setResultsName("length") # km (Line only)
        v_ratio = real.setResultsName("v_ratio") # kV/kV (Transformer only)
        r = real.setResultsName("r") # p.u. or Ohms/km
        x = real.setResultsName("x") # p.u. or Henrys/km
        b = real.setResultsName("b") # p.u. or Farads/km (Line only)
        tap_ratio = real.setResultsName("tap") # p.u./p.u. (Transformer only)
        phase_shift = real.setResultsName("shift") # degrees (Transformer only)
        i_limit = Optional(real).setResultsName("i_limit") # p.u.
        p_limit = Optional(real).setResultsName("p_limit") # p.u.
        s_limit = Optional(real).setResultsName("s_limit") # p.u.
        status = Optional(boolean).setResultsName("status")

        line_data = from_bus + to_bus + s_rating + v_rating + \
            f_rating + length + v_ratio + r + x + b + tap_ratio + \
            phase_shift + i_limit + p_limit + s_limit + status + scolon

        line_data.setParseAction(self.push_line)

        line_array = Literal("Line.con") + "=" + "[" + "..." + \
            ZeroOrMore(line_data + Optional("]" + scolon))

        return line_array