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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def filter(self, *args, **kwargs):
 """ Adds WHERE arguments to the queryset, returning a new queryset #TODO: show examples :rtype: AbstractQuerySet """

        #add arguments to the where clause filters
        if len([x for x in kwargs.values() if x is None]):
            raise CQLEngineException("None values on filter are not allowed")

        clone = copy.deepcopy(self)
        for operator in args:
            if not isinstance(operator, WhereClause):
                raise QueryException('{} is not a valid query operator'.format(operator))
            clone._where.append(operator)

        for arg, val in kwargs.items():
            col_name, col_op = self._parse_filter_arg(arg)
            quote_field = True
            #resolve column and operator
            try:
                column = self.model._get_column(col_name)
            except KeyError:
                if col_name == 'pk__token':
                    if not isinstance(val, Token):
                        raise QueryException("Virtual column 'pk__token' may only be compared to Token() values")
                    column = columns._PartitionKeysToken(self.model)
                    quote_field = False
                else:
                    raise QueryException("Can't resolve column name: '{}'".format(col_name))

            if isinstance(val, Token):
                if col_name != 'pk__token':
                    raise QueryException("Token() values may only be compared to the 'pk__token' virtual column")
                partition_columns = column.partition_columns
                if len(partition_columns) != len(val.value):
                    raise QueryException(
                        'Token() received {} arguments but model has {} partition keys'.format(
                            len(val.value), len(partition_columns)))
                val.set_columns(partition_columns)

            #get query operator, or use equals if not supplied
            operator_class = BaseWhereOperator.get_operator(col_op or 'EQ')
            operator = operator_class()

            if isinstance(operator, InOperator):
                if not isinstance(val, (list, tuple)):
                    raise QueryException('IN queries must use a list/tuple value')
                query_val = [column.to_database(v) for v in val]
            elif isinstance(val, BaseQueryFunction):
                query_val = val
            else:
                query_val = column.to_database(val)

            clone._where.append(WhereClause(column.db_field_name, operator, query_val, quote_field=quote_field))

        return clone