🚥 👆 ▶️ ⏮️ **FastAPI** 👆 💪 💚 🚶 ⚫️ 🔜.

🐍, 👆 💪 ✍ 🔑 👨‍💼 <a href="https://docs.python.org/3/reference/datamodel.html#context-managers" class="external-link" target="_blank">🏗 🎓 ⏮️ 2️⃣ 👩‍🔬: `__enter__()` &amp; `__exit__()`</a>.

👆 💪 ⚙️ 👫 🔘 **FastAPI** 🔗 ⏮️ `yield` ⚙️
`with` ⚖️ `async with` 📄 🔘 🔗 🔢:

```Python hl_lines="1-9  13"
{!../../../docs_src/dependencies/tutorial010.py!}
```

!!! tip

        generator.setApplicationName("Gradle")
        generator.setOptsEnvironmentVar("GRADLE_OPTS")
        generator.setExitEnvironmentVar("GRADLE_EXIT_CONSOLE")
        generator.setMainClassName("org.gradle.launcher.GradleMain")
        generator.setScriptRelPath("bin/gradle")
        generator.setClasspath(listOf("lib/$launcherJarName"))

In Python, you can create Context Managers by <a href="https://docs.python.org/3/reference/datamodel.html#context-managers" class="external-link" target="_blank">creating a class with two methods: `__enter__()` and `__exit__()`</a>.

You can also use them inside of **FastAPI** dependencies with `yield` by using
`with` or `async with` statements inside of the dependency function:

```Python hl_lines="1-9  13"

!!! note "技術詳細"
    以下と一緒に使用できる関数なら何でも有効です:

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

pkg syscall (linux-arm-cgo), const SYS_EVENTFD2 ideal-int
pkg syscall (linux-arm-cgo), const SYS_EXECVE ideal-int
pkg syscall (linux-arm-cgo), const SYS_EXIT ideal-int
pkg syscall (linux-arm-cgo), const SYS_EXIT_GROUP ideal-int
pkg syscall (linux-arm-cgo), const SYS_FACCESSAT ideal-int
pkg syscall (linux-arm-cgo), const SYS_FALLOCATE ideal-int

pkg syscall (linux-386), const SYS_EVENTFD = 323
pkg syscall (linux-386), const SYS_EVENTFD2 = 328
pkg syscall (linux-386), const SYS_EXECVE = 11
pkg syscall (linux-386), const SYS_EXIT = 1
pkg syscall (linux-386), const SYS_EXIT_GROUP = 252
pkg syscall (linux-386), const SYS_FACCESSAT = 307
pkg syscall (linux-386), const SYS_FADVISE64 = 250
pkg syscall (linux-386), const SYS_FADVISE64_64 = 272

В Python для создания менеджеров контекста можно <a href="https://docs.python.org/3/reference/datamodel.html#context-managers" class="external-link" target="_blank">создать класс с двумя методами: `__enter__()` и `__exit__()`</a>.

Вы также можете использовать их внутри зависимостей **FastAPI** с `yield`, используя операторы
`with` или `async with` внутри функции зависимости:

```Python hl_lines="1-9  13"

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>.

Sie können solche auch innerhalb von **FastAPI**-Abhängigkeiten mit `yield` verwenden, indem Sie `with`- oder `async with`-Anweisungen innerhalb der Abhängigkeits-Funktion verwenden:

```Python hl_lines="1-9  13"

!!! warning
    这是一个更为“高级”的想法。

    如果您刚开始使用**FastAPI**，您可能暂时可以跳过它。

在Python中，你可以通过<a href="https://docs.python.org/3/reference/datamodel.html#context-managers" class="external-link" target="_blank">创建一个带有`__enter__()`和`__exit__()`方法的类</a>来创建上下文管理器。

你也可以在**FastAPI**的依赖项中使用带有`yield`的`with`或`async with`语句，通过在依赖函数内部使用它们。

```Python hl_lines="1-9  13"
{!../../../docs_src/dependencies/tutorial010.py!}
```

!!! tip

pkg syscall (darwin-arm64), const NOTE_EXIT_DETAIL = 33554432
pkg syscall (darwin-arm64), const NOTE_EXIT_DETAIL ideal-int
pkg syscall (darwin-arm64), const NOTE_EXIT_DETAIL_MASK = 458752
pkg syscall (darwin-arm64), const NOTE_EXIT_DETAIL_MASK ideal-int
pkg syscall (darwin-arm64), const NOTE_EXIT_MEMORY = 131072
pkg syscall (darwin-arm64), const NOTE_EXIT_MEMORY ideal-int