'Set the ``data_lines`` attribute to the lines slice comprising the
table data values.'

def get_data_lines(self, lines):

    data_lines = self.process_lines(lines)
    start_line = _get_line_index(self.start_line, data_lines)
    end_line = _get_line_index(self.end_line, data_lines)
    if ((start_line is not None) or (end_line is not None)):
        self.data_lines = data_lines[slice(start_line, end_line)]
    else:
        self.data_lines = data_lines
