code: def __get_attr(what, type_attr, value_attr, **kwargs):
          
          if what in kwargs:
              value = int(kwargs[what]) if type_attr == 'int' else kwargs[what]
              if value in value_attr:
                  return value
docs: get the value of a parm
          :param what: string parm
          :param type_attr: type of parm
          :param value_attr:
          :param kwargs:
          :return: value of the parm