# 🔗 ⏮️ 🌾

FastAPI 🐕‍🦺 🔗 👈 <abbr title='sometimes also called "exit", "cleanup", "teardown", "close", "context managers", ...'>➕ 🔁 ⏮️ 🏁</abbr>.

👉, ⚙️ `yield` ↩️ `return`, &amp; ✍ ➕ 🔁 ⏮️.

/// tip

⚒ 💭 ⚙️ `yield` 1️⃣ 👁 🕰.

///

/// note | "📡 ℹ"

🙆 🔢 👈 ☑ ⚙️ ⏮️:

* <a href="https://docs.python.org/3/library/contextlib.html#contextlib.contextmanager" class="external-link" target="_blank">`@contextlib.contextmanager`</a> ⚖️

        provider,
      )
    factory.init(null as KeyStore?)
    val trustManagers = factory.trustManagers!!
    check(trustManagers.size == 1 && trustManagers[0] is X509TrustManager) {
      "Unexpected default trust managers: ${trustManagers.contentToString()}"
    }
    return trustManagers[0] as X509TrustManager
  }

  override fun trustManager(sslSocketFactory: SSLSocketFactory): X509TrustManager =
    throw UnsupportedOperationException(

        init(null as KeyStore?)
      }.trustManagers!!
    check(trustManagers.size == 1 && trustManagers[0] is X509TrustManager) {
      "Unexpected default trust managers: ${trustManagers.contentToString()}"
    }
    val x509TrustManager = trustManagers[0] as X509TrustManager
    // Disabled because OkHttp will run anyway

# yieldを持つ依存関係

FastAPIは、いくつかの<abbr title='時々"exit"、"cleanup"、"teardown"、"close"、"context managers"、 ...のように呼ばれる'>終了後の追加のステップ</abbr>を行う依存関係をサポートしています。

これを行うには、`return`の代わりに`yield`を使い、その後に追加のステップを書きます。

/// tip | "豆知識"

`yield`は必ず一度だけ使用するようにしてください。

///

/// info | "情報"

これを動作させるには、**Python 3.7** 以上を使用するか、**Python 3.6** では"backports"をインストールする必要があります:

```
pip install async-exit-stack async-generator
```

    TrustManager[] trustManagers = trustManagerFactory.getTrustManagers();
    if (trustManagers.length != 1 || !(trustManagers[0] instanceof X509TrustManager)) {
      throw new IllegalStateException("Unexpected default trust managers:"
          + Arrays.toString(trustManagers));
    }
    return (X509TrustManager) trustManagers[0];
  }

  private String[] javaNames(List<CipherSuite> cipherSuites) {

    check(trustManagers.size == 1 && trustManagers[0] is X509TrustManager) {
      "Unexpected default trust managers: ${trustManagers.contentToString()}"
    }
    return trustManagers[0] as X509TrustManager
  }

  open fun trustManager(sslSocketFactory: SSLSocketFactory): X509TrustManager? {
    return try {
      // Attempt to get the trust manager from an OpenJDK socket factory. We attempt this on all

# 使用yield的依赖项

FastAPI支持在完成后执行一些<abbr title='有时也被称为"退出"("exit")，"清理"("cleanup")，"拆卸"("teardown")，"关闭"("close")，"上下文管理器"("context managers")。 ...'>额外步骤</abbr>的依赖项.

为此，你需要使用 `yield` 而不是 `return`，然后再编写这些额外的步骤（代码）。

/// tip | 提示

确保在每个依赖中只使用一次 `yield`。

///

/// note | "技术细节"

任何一个可以与以下内容一起使用的函数：

# Зависимости с yield

FastAPI поддерживает зависимости, которые выполняют некоторые <abbr title='также известные как "exit", "cleanup", "teardown", "close", "context managers", ...'>дополнительные действия после завершения работы</abbr>.

Для этого используйте `yield` вместо `return`, а дополнительный код напишите после него.

/// tip | "Подсказка"

Обязательно используйте `yield` один-единственный раз.

///

/// note | "Технические детали"

Wenn Sie gerade erst mit **FastAPI** beginnen, möchten Sie das vielleicht vorerst überspringen.

///

In Python können Sie Kontextmanager erstellen, indem Sie <a href="https://docs.python.org/3/reference/datamodel.html#context-managers" class="external-link" target="_blank">eine Klasse mit zwei Methoden erzeugen: `__enter__()` und `__exit__()`</a>.

Se você está apenas iniciando com o **FastAPI** você pode querer pular isso por enquanto.

///

Em python, você pode criar Gerenciadores de Contexto ao <a href="https://docs.python.org/3/reference/datamodel.html#context-managers" class="external-link" target="_blank"> criar uma classe com dois métodos: `__enter__()` e `__exit__()`</a>.