Grab package verion

def description(self):
        """Grab package verion
        """
        for line in self.SLACKBUILDS_TXT.splitlines():
            if line.startswith(self.line_name):
                sbo_name = line[17:].strip()
            if line.startswith(self.line_des):
                if sbo_name == self.name:
                    return line[31:].strip()