```

🔜, 🕐❔ 🖥 🏗 👩‍💻 ⏮️ 🔐, 🛠️ 🔜 📨 🎏 🔐 📨.

👉 💼, ⚫️ 💪 🚫 ⚠, ↩️ ⚫️ 🎏 👩‍💻 📨 🔐.

✋️ 🚥 👥 ⚙️ 🎏 🏷 ➕1️⃣ *➡ 🛠️*, 👥 💪 📨 👆 👩‍💻 🔐 🔠 👩‍💻.

!!! danger
    🙅 🏪 ✅ 🔐 👩‍💻 ⚖️ 📨 ⚫️ 📨 💖 👉, 🚥 👆 💭 🌐 ⚠ & 👆 💭 ⚫️❔ 👆 🔨.

## 🚮 🔢 🏷

👥 💪 ↩️ ✍ 🔢 🏷 ⏮️ 🔢 🔐 & 🔢 🏷 🍵 ⚫️:

=== "🐍 3️⃣.6️⃣ & 🔛"

    ```Python hl_lines="9  11  16"

        ] = None,
        lifespan: Annotated[
            Optional[Lifespan[AppType]],
            Doc(
                """
                A `Lifespan` context manager handler. This replaces `startup` and
                `shutdown` functions with a single context manager.

                Read more in the
                [FastAPI docs for `lifespan`](https://fastapi.tiangolo.com/advanced/events/).
                """
            ),

from fastapi import FastAPI

tags_metadata = [
    {
        "name": "users",
        "description": "Operations with users. The **login** logic is also here.",
    },
    {
        "name": "items",
        "description": "Manage items. So _fancy_ they have their own docs.",
        "externalDocs": {
            "description": "Items external docs",
            "url": "https://fastapi.tiangolo.com/",
        },
    },
]

                "name": "users",
                "description": "Operations with users. The **login** logic is also here.",
            },
            {
                "name": "items",
                "description": "Manage items. So _fancy_ they have their own docs.",
                "externalDocs": {
                    "description": "Items external docs",
                    "url": "https://fastapi.tiangolo.com/",
                },

# 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
    ```

# FastAPI CLI

**FastAPI CLI** is a command line program `fastapi` that you can use to serve your FastAPI app, manage your FastAPI project, and more.

When you install FastAPI (e.g. with `pip install fastapi`), it includes a package called `fastapi-cli`, this package provides the `fastapi` command in the terminal.

To run your FastAPI app for development, you can use the `fastapi dev` command:

<div class="termy">

```console

Das kann insbesondere eine gute Alternative zur Logik in einer Middleware sein.

Wenn Sie beispielsweise den Requestbody lesen oder manipulieren möchten, bevor er von Ihrer Anwendung verarbeitet wird.

!!! danger "Gefahr"
    Dies ist eine „fortgeschrittene“ Funktion.

    Wenn Sie gerade erst mit **FastAPI** beginnen, möchten Sie diesen Abschnitt vielleicht überspringen.

## Anwendungsfälle

Einige Anwendungsfälle sind:

* **Модель для ввода** должна иметь возможность содержать пароль.
* **Модель для вывода** не должна содержать пароль.
* **Модель для базы данных**, возможно, должна содержать хэшированный пароль.

!!! danger "Внимание"
    Никогда не храните пароли пользователей в чистом виде. Всегда храните "безопасный хэш", который вы затем сможете проверить.

* The **input model** needs to be able to have a password.
* The **output model** should not have a password.
* The **database model** would probably need to have a hashed password.

!!! danger
    Never store user's plaintext passwords. Always store a "secure hash" that you can then verify.

        lifespan: Annotated[
            Optional[Lifespan[Any]],
            Doc(
                """
                A `Lifespan` context manager handler. This replaces `startup` and
                `shutdown` functions with a single context manager.

                Read more in the
                [FastAPI docs for `lifespan`](https://fastapi.tiangolo.com/advanced/events/).
                """
            ),