participant dep as Dep with yield
participant operation as Path Operation
participant tasks as Background tasks

    Note over client,tasks: Can raise exception for dependency, handled after response is sent
    Note over client,operation: Can raise HTTPException and can change the response
    client ->> dep: Start request
    Note over dep: Run code up to yield
    opt raise
        dep -->> handler: Raise HTTPException

      "Server-sent frames must not be masked.",
    )
    server.listener.assertClosing(1000, "Hello")
    server.listener.assertExhausted() // Client should not have sent second close.
  }

  @Test
  fun protocolErrorAfterCloseDoesNotSendClose() {
    client.webSocket!!.close(1000, "Hello!")
    server.processNextFrame()

    // Not closed until close reply is received.

Note that due to this extension behavior, AWS SDK's may not support the extension functionality pertaining to replicating versioned deletes.

Поскольку по умолчанию, отдельные значения интерпретируются как query-параметры, вам не нужно явно добавлять `Query`, вы можете просто сделать так:

```Python
q: Union[str, None] = None
```

Или в Python 3.10 и выше:

```Python
q: str | None = None
```

Например:

=== "Python 3.10+"

    ```Python hl_lines="27"
    {!> ../../../docs_src/body_multiple_params/tutorial004_an_py310.py!}
    ```

```

デフォルト値`None`を`Query(default=None)`に置き換える必要があるので、`Query`の最初の引数はデフォルト値を定義するのと同じです。

なので:

```Python
q: Optional[str] = Query(default=None)
```

...を以下と同じようにパラメータをオプションにします:

```Python
q: Optional[str] = None
```

しかし、これはクエリパラメータとして明示的に宣言しています。

!!! info "情報"
    FastAPIは以下の部分を気にすることを覚えておいてください:

    ```Python
    = None
    ```

    もしくは:

    /**
     * Override the [Request.url] for caching, if it is either polluted with
     * transient query params, or has a canonical URL possibly for a CDN.
     *
     * Note that POST requests will not be sent to the server if this URL is set
     * and matches a cached response.
     */
    fun cacheUrlOverride(cacheUrlOverride: HttpUrl?) =
      apply {
        this.cacheUrlOverride = cacheUrlOverride

Requests for identities not running on the node are rejected.
This is critical to ensure that a compromised node does not compromise the entire mesh.

This CA enforcement is done by Istio's CA, and is a requirement for any alternative CAs integrating with Ztunnel.

    call: Call,
    byteCount: Long,
  ) {
  }

  /**
   * Invoked when a request fails to be written.
   *
   * This method is invoked after [requestHeadersStart] or [requestBodyStart]. Note that request
   * failures do not necessarily fail the entire call.
   */
  open fun requestFailed(
    call: Call,
    ioe: IOException,
  ) {
  }

  /**

```Python
contents = myfile.file.read()
```

!!! note "Технические детали `async`"
    При использовании методов `async` **FastAPI** запускает файловые методы в пуле потоков и ожидает их.

!!! note "Технические детали Starlette"

<span style="color: green;">INFO</span>:     Waiting for application startup.
<span style="color: green;">INFO</span>:     Application startup complete.
```

</div>

!!! note "참고"
    `uvicorn main:app` 명령은 다음을 의미합니다:

    * `main`: 파일 `main.py` (파이썬 "모듈").
    * `app`: `main.py` 내부의 `app = FastAPI()` 줄에서 생성한 오브젝트.
    * `--reload`: 코드 변경 시 자동으로 서버 재시작. 개발 시에만 사용.