### 依存関係の要件

これらはリクエストの要件（ヘッダのようなもの）やその他のサブ依存関係を宣言することができます:

```Python hl_lines="6 11"
{!../../../docs_src/dependencies/tutorial006.py!}
```

### 例外の発生

これらの依存関係は通常の依存関係と同じように、例外を`raise`発生させることができます:

```Python hl_lines="8 13"
{!../../../docs_src/dependencies/tutorial006.py!}
```

### 戻り値

そして、値を返すことも返さないこともできますが、値は使われません。

つまり、すでにどこかで使っている通常の依存関係（値を返すもの）を再利用することができ、値は使われなくても依存関係は実行されます:

    ```Python hl_lines="6  11"
    {!> ../../../docs_src/dependencies/tutorial006.py!}
    ```

### Вызов исключений

Зависимости из dependencies могут вызывать исключения с помощью `raise`, как и обычные зависимости:

=== "Python 3.9+"

    ```Python hl_lines="10  15"
    {!> ../../../docs_src/dependencies/tutorial006_an_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="9  14"

  // RuntimeClass. Pods using this RuntimeClass can only be scheduled to a
  // node matched by this selector. The RuntimeClass nodeSelector is merged
  // with a pod's existing nodeSelector. Any conflicts will cause the pod to
  // be rejected in admission.
  // +optional
  // +mapType=atomic
  map<string, string> nodeSelector = 1;

  // tolerations are appended (excluding duplicates) to pods running with this

    ```Python hl_lines="6  11"
    {!> ../../../docs_src/dependencies/tutorial006.py!}
    ```

### Exceptions auslösen

Die Abhängigkeiten können Exceptions `raise`n, genau wie normale Abhängigkeiten:

=== "Python 3.9+"

    ```Python hl_lines="10  15"
    {!> ../../../docs_src/dependencies/tutorial006_an_py39.py!}
    ```

=== "Python 3.8+"

    its own IDN mapping table in the library.

 *  New: Prefer the client's configured precedence order for TLS cipher suites. (OkHttp used to
    prefer the JDK’s precedence order.) This change may cause your HTTP calls to negotiate a
    different cipher suite than before! OkHttp's defaults cipher suites are selected for good
    security and performance.

/**
 * Factory for [calls][Call], which can be used to send HTTP requests and read their responses.
 *
 * ## OkHttpClients Should Be Shared
 *
 * OkHttp performs best when you create a single `OkHttpClient` instance and reuse it for all of
 * your HTTP calls. This is because each client holds its own connection pool and thread pools.
 * Reusing connections and threads reduces latency and saves memory. Conversely, creating a client

    // again with a different route.
    if (e is SSLHandshakeException) {
      // If the problem was a CertificateException from the X509TrustManager,
      // do not retry.
      if (e.cause is CertificateException) {
        return false
      }
    }
    if (e is SSLPeerUnverifiedException) {
      // e.g. a certificate pinning error.
      return false
    }

        well as Sequential models built with an explicit input shape are not
        affected.
    *   The methods `Model.to_yaml()` and `keras.models.model_from_yaml` have
        been replaced to raise a `RuntimeError` as they can be abused to cause
        arbitrary code execution. It is recommended to use JSON serialization
        instead of YAML, or, a better alternative, serialize to H5.
    *   `LinearModel` and `WideDeepModel` are moved to the

它的属性 `scopes`  是作用域列表，所有依赖项都把它作为子依赖项。也就是说所有**依赖**……这听起来有些绕，后文会有解释。

（类 `SecurityScopes` 的）`security_scopes` 对象还提供了单字符串类型的属性 `scope_str`，该属性是（要在本例中使用的）用空格分割的作用域。

此处还创建了后续代码中要复用（`raise`）的 `HTTPException` 。

该异常包含了作用域所需的（如有），以空格分割的字符串（使用 `scope_str`）。该字符串要放到包含作用域的 `WWW-Authenticate` 请求头中（这也是规范的要求）。

```Python hl_lines="105  107-115"
{!../../../docs_src/security/tutorial005.py!}
```

Wir erstellen eine `HTTPException`, die wir später an mehreren Stellen wiederverwenden (`raise`n) können.