How to use the pyravendb.data.query.QueryOperator.AND function in pyravendb

def and_also(self):
        if len(self._where_tokens) > 0:
            last = self._where_tokens[-1]
            if last:
                if isinstance(self.query_parameters[last.value], QueryOperator):
                    raise InvalidOperationException("Cannot add AND, previous token was already an QueryOperator.")

                self._where_tokens.append(_Token(value=QueryOperator.AND, write="AND"))

        return self

def _add_operator_if_needed(self):
        self.assert_no_raw_query()

        if len(self._where_tokens) > 0:
            query_operator = None
            last_token = self._where_tokens[-1]
            if last_token is not None and last_token.token in Query.where_operators:
                query_operator = QueryOperator.AND if self.default_operator == QueryOperator.AND else QueryOperator.OR
            search_operator = getattr(last_token, "search_operator", None)
            if search_operator and search_operator != QueryOperator.OR:
                # default to OR operator after search if AND was not specified explicitly
                query_operator = QueryOperator.OR

            if query_operator:
                self._where_tokens.append(_Token(write=str(query_operator)))

elif token.token == "equals":
            write = " = $" + token.value
        elif token.token == "not_equals":
            write = " != $" + token.value
        elif token.token == "greater_than":
            write = " > $" + token.value
        elif token.token == "greater_than_or_equal":
            write = " >= $" + token.value
        elif token.token == "less_than":
            write = " < $" + token.value
        elif token.token == "less_than_or_equal":
            write = " <= $" + token.value
        elif token.token == "search":
            write_builder = [", $", token.value]
            search_operator = getattr(token, "search_operator", None)
            if search_operator and search_operator == QueryOperator.AND:
                write_builder.append(", AND")
            write_builder.append(")")
            write = "".join(write_builder)
        elif token.token == "lucene":
            write = ", $" + token.value + ")"
        elif token.token == "startsWith":
            write = ", $" + token.value + ")"
        elif token.token == "endsWith":
            write = ", $" + token.value + ")"
        elif token.token == "exists":
            write = ")"
        elif token.token == "select":
            write_builder = []
            for value in token.value:
                if len(write_builder) > 0:
                    write_builder.append(", ")