{* ../../docs_src/path_operation_configuration/tutorial005_py310.py hl[18] *}

/// info | 정보

`response_description`은 구체적으로 응답을 지칭하며, `description`은 일반적인 *경로 처리*를 지칭합니다.

///

/// check | 확인

OpenAPI는 각 *경로 처리*가 응답에 관한 설명을 요구할 것을 명시합니다.

따라서, 응답에 관한 설명을 제공하지 않으면, **FastAPI**가 "Successful response" 중 하나를 자동으로 생성합니다.

///

<img src="/img/tutorial/path-operation-configuration/image03.png">

* `limit=10`：因為那是預設值

## 選用參數 { #optional-parameters }

同樣地，你可以將預設值設為 `None` 來宣告選用的查詢參數：

{* ../../docs_src/query_params/tutorial002_py310.py hl[7] *}

在這種情況下，函式參數 `q` 為選用，且預設為 `None`。

/// check | 注意

另外請注意，FastAPI 能辨識出路徑參數 `item_id` 是路徑參數，而 `q` 不是，因此 `q` 會被當作查詢參數。

///

## 查詢參數型別轉換 { #query-parameter-type-conversion }

你也可以宣告 `bool` 型別，值會被自動轉換：

        # shellcheck disable=SC2039,SC3045
        MAX_FD=$( ulimit -H -n ) ||
            warn "Could not query maximum file descriptor limit"
    esac
    case $MAX_FD in  #(
      '' | soft) :;; #(
      *)
        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
        # shellcheck disable=SC2039,SC3045

            for (int i = 0; i < KerberosConstants.CHECKSUM_SIZE; i++) {
                if (plainDataChecksum[i] != data[i]) {
                    throw new GeneralSecurityException("Checksum failed while decrypting.");
                }
            }
        }

        int decryptLength = plainData.length - KerberosConstants.CONFOUNDER_SIZE;
        decrypt = new byte[decryptLength];

                createDefaultReadingConverter(), createDefaultReadingConverter(), createDefaultNormalizer(), analyzer);

        assertNotNull(items);
        // Should handle large text by splitting into chunks
        assertTrue(items.size() > 0);
    }

    @Test
    public void test_analyzeText() throws Exception {
        SuggestAnalyzer analyzer = suggester.settings().analyzer().new DefaultContentsAnalyzer();

     * @return new transform header instance
     */
    public static Smb2TransformHeader decode(final byte[] buffer, int bufferIndex) {
        final Smb2TransformHeader header = new Smb2TransformHeader();

        // Check protocol ID
        final int protocolId = SMBUtil.readInt4(buffer, bufferIndex);
        if (protocolId != TRANSFORM_PROTOCOL_ID) {

        ASN1ObjectIdentifier unsupported = new ASN1ObjectIdentifier("1.2.3.4.5");
        byte[] init = spnegoInitWithMechs(unsupported);

        // Host is a FQDN to pass the short-name check
        SmbUnsupportedOperationException ex =
                assertThrows(SmbUnsupportedOperationException.class, () -> auth.createContext(tc, null, "server.example.com", init, false));

    }

    @Override
    public void onOutput(TestDescriptor testDescriptor, TestOutputEvent outputEvent) {
        TestDescriptor suite = testDescriptor.getParent();

        // Check if this is output from the test suite itself (e.g. afterTest or beforeTest)
        if (testDescriptor.isComposite()) {
            suite = testDescriptor;
        }

  }

  /*
   * Whenever an implementation uses `instanceof` on a parameter instance, the test has to know that
   * (so much for "black box") and try instances that both do and don't pass the check. The "don't"
   * half of that is more awkward to arrange...
   */
  private static <T> Iterable<T> iterable(Collection<T> collection) {
    // return collection::iterator;
    return new Iterable<T>() {

        @DisplayName("Should return correct size with multiple chunks")
        @ValueSource(ints = { 1, 2, 3, 5, 10, 100 })
        void testSizeWithMultipleChunks(int chunkCount) {
            // Given
            byte[] sourceKey = new byte[SOURCE_KEY_SIZE];
            SrvCopychunk[] chunks = new SrvCopychunk[chunkCount];
            for (int i = 0; i < chunkCount; i++) {
                chunks[i] = new SrvCopychunk(i * 100, i * 200, i * 300);