signup_ts: datetime | None = None
    friends: list[int] = []


external_data = {
    "id": "123",
    "signup_ts": "2017-06-01 12:22",
    "friends": [1, "2", b"3"],
}
user = User(**external_data)
print(user)
# > User id=123 name='John Doe' signup_ts=datetime.datetime(2017, 6, 1, 12, 22) friends=[1, 2, 3]
print(user.id)

    friends: list[int] = []


external_data = {
    "id": "123",
    "signup_ts": "2017-06-01 12:22",
    "friends": [1, "2", b"3"],
}
user = User(**external_data)
print(user)
# > User id=123 name='John Doe' signup_ts=datetime.datetime(2017, 6, 1, 12, 22) friends=[1, 2, 3]
print(user.id)

    friends: List[int] = []


external_data = {
    "id": "123",
    "signup_ts": "2017-06-01 12:22",
    "friends": [1, "2", b"3"],
}
user = User(**external_data)
print(user)
# > User id=123 name='John Doe' signup_ts=datetime.datetime(2017, 6, 1, 12, 22) friends=[1, 2, 3]
print(user.id)

```JSON
{
    "name": "Foo",
    "description": "The pretender",
    "price": 42.0,
    "tax": 3.2
}
```

✋️ 👆 💪 📣 💗 💪 🔢, ✅ `item` & `user`:

=== "🐍 3️⃣.6️⃣ & 🔛"

    ```Python hl_lines="22"
    {!> ../../../docs_src/body_multiple_params/tutorial002.py!}
    ```

=== "🐍 3️⃣.1️⃣0️⃣ & 🔛"

    ```Python hl_lines="20"
    {!> ../../../docs_src/body_multiple_params/tutorial002_py310.py!}
    ```

Здесь мы передаём аргумент `example`, как пример данных ожидаемых в параметре `Body()`:

=== "Python 3.10+"

    ```Python hl_lines="22-27"
    {!> ../../../docs_src/schema_extra_example/tutorial003_an_py310.py!}
    ```

=== "Python 3.9+"

    ```Python hl_lines="22-27"
    {!> ../../../docs_src/schema_extra_example/tutorial003_an_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="23-28"

=== "Python 3.10+"

    ```Python hl_lines="20"
    {!> ../../../docs_src/body_multiple_params/tutorial002_py310.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="22"
    {!> ../../../docs_src/body_multiple_params/tutorial002.py!}
    ```

In this case, **FastAPI** will notice that there are more than one body parameters in the function (two parameters that are Pydantic models).

```

### Das OpenAPI-Schema ändern

Jetzt können Sie die ReDoc-Erweiterung hinzufügen und dem `info`-„Objekt“ im OpenAPI-Schema ein benutzerdefiniertes `x-logo` hinzufügen:

```Python hl_lines="22-24"
{!../../../docs_src/extending_openapi/tutorial001.py!}
```

### Zwischenspeichern des OpenAPI-Schemas

Sie können die Eigenschaft `.openapi_schema` als „Cache“ verwenden, um Ihr generiertes Schema zu speichern.

... haben wir deklariert, dass `response_model` das Modell `UserOut` ist, welches das Passwort nicht enthält:

=== "Python 3.10+"

    ```Python hl_lines="22"
    {!> ../../../docs_src/response_model/tutorial003_py310.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="22"
    {!> ../../../docs_src/response_model/tutorial003.py!}
    ```

## Import and set up `SQLAlchemy`

* Import `SQLAlchemy`.
* Create a `metadata` object.
* Create a table `notes` using the `metadata` object.

```Python hl_lines="4  14  16-22"
{!../../../docs_src/async_sql_databases/tutorial001.py!}
```

!!! tip
    Notice that all this code is pure SQLAlchemy Core.

    `databases` is not doing anything here yet.

## Import and set up `databases`

    ```

...👥 📣 `response_model` 👆 🏷 `UserOut`, 👈 🚫 🔌 🔐:

=== "🐍 3️⃣.6️⃣ & 🔛"

    ```Python hl_lines="22"
    {!> ../../../docs_src/response_model/tutorial003.py!}
    ```

=== "🐍 3️⃣.1️⃣0️⃣ & 🔛"

    ```Python hl_lines="22"
    {!> ../../../docs_src/response_model/tutorial003_py310.py!}
    ```

, **FastAPI** 🔜 ✊ 💅 🖥 👅 🌐 💽 👈 🚫 📣 🔢 🏷 (⚙️ Pydantic).