code: def get_three_parameters(self, regex_exp, parameters):
          
          Rx, Ry, Rz, other = self.get_parameters(regex_exp, parameters)
          if other is not None and other.strip():
              raise iarm.exceptions.ParsingError("Extra arguments found: {}".format(other))
          return Rx.upper(), Ry.upper(), Rz.upper()
docs: Get three parameters from a given regex expression
  
          Raise an exception if more than three were found
          :param regex_exp:
          :param parameters:
          :return: