```Python hl_lines="3  17"
{!> ../../docs_src/path_operation_configuration/tutorial001_py39.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="3  17"
{!> ../../docs_src/path_operation_configuration/tutorial001.py!}
```

////

Dieser Statuscode wird in der Response verwendet und zum OpenAPI-Schema hinzugefügt.

/// note | "Technische Details"

Sie können auch `from starlette import status` verwenden.

//// tab | Python 3.8+ без Annotated

/// tip | "Подсказка"

Рекомендуется использовать версию с `Annotated` если возможно.

///

```Python hl_lines="3"
{!> ../../docs_src/path_params_numeric_validations/tutorial001.py!}
```

////

/// info | "Информация"

Поддержка `Annotated` была добавлена в FastAPI начиная с версии 0.95.0 (и с этой версии рекомендуется использовать этот подход).

```Python hl_lines="3"
{!../../docs_src/query_params_str_validations/tutorial002.py!}
```

## Utiliser `Query` comme valeur par défaut

Construisez ensuite la valeur par défaut de votre paramètre avec `Query`, en choisissant 50 comme `max_length` :

```Python hl_lines="9"
{!../../docs_src/query_params_str_validations/tutorial002.py!}
```

{* ../../docs_src/first_steps/tutorial001.py hl[7] *}

This is a Python function.

It will be called by **FastAPI** whenever it receives a request to the URL "`/`" using a `GET` operation.

In this case, it is an `async` function.

---

You could also define it as a normal function instead of `async def`:

{* ../../docs_src/first_steps/tutorial003.py hl[7] *}

/// note

```Python hl_lines="7"
{!../../docs_src/first_steps/tutorial003.py!}
```

/// note

Nếu bạn không biết sự khác nhau, kiểm tra [Async: *"Trong khi vội vàng?"*](../async.md#in-a-hurry){.internal-link target=_blank}.

///

### Bước 5: Nội dung trả về

```Python hl_lines="8"
{!../../docs_src/first_steps/tutorial001.py!}
```

```Python
{!../../docs_src/python_types/tutorial001.py!}
```

🤙 👉 📋 🔢:

```
John Doe
```

🔢 🔨 📄:

* ✊ `first_name` & `last_name`.
* 🗜 🥇 🔤 🔠 1️⃣ ↖ 💼 ⏮️ `title()`.
* <abbr title="Puts them together, as one. With the contents of one after the other.">🔢</abbr> 👫 ⏮️ 🚀 🖕.

```Python hl_lines="2"
{!../../docs_src/python_types/tutorial001.py!}
```

### ✍ ⚫️

⚫️ 📶 🙅 📋.

```Python hl_lines="7"
{!../../docs_src/first_steps/tutorial003.py!}
```

/// note

Jeśli nie znasz różnicy, sprawdź [Async: *"In a hurry?"*](../async.md#in-a-hurry){.internal-link target=_blank}.

///

### Krok 5: zwróć zawartość

```Python hl_lines="8"
{!../../docs_src/first_steps/tutorial001.py!}
```

{!../../docs_src/extending_openapi/tutorial001.py!}
```

### 🏗 🗄 🔗

⤴️, ⚙️ 🎏 🚙 🔢 🏗 🗄 🔗, 🔘 `custom_openapi()` 🔢:

```Python hl_lines="2  15-20"
{!../../docs_src/extending_openapi/tutorial001.py!}
```

### 🔀 🗄 🔗

🔜 👆 💪 🚮 📄 ↔, ❎ 🛃 `x-logo` `info` "🎚" 🗄 🔗:

```Python hl_lines="21-23"
{!../../docs_src/extending_openapi/tutorial001.py!}
```

### 💾 🗄 🔗

```Python hl_lines="13  15"
{!../../docs_src/custom_request_and_route/tutorial002.py!}
```

If an exception occurs, the`Request` instance will still be in scope, so we can read and make use of the request body when handling the error:

```Python hl_lines="16-18"
{!../../docs_src/custom_request_and_route/tutorial002.py!}
```

## Custom `APIRoute` class in a router

```Python hl_lines="1"
{!> ../../docs_src/python_types/tutorial006.py!}
```

Deklarieren Sie die Variable mit der gleichen Doppelpunkt-Syntax (`:`).

Als Typ nehmen Sie das `List`, das Sie von `typing` importiert haben.

Da die Liste ein Typ ist, welcher innere Typen enthält, werden diese von eckigen Klammern umfasst:

```Python hl_lines="4"
{!> ../../docs_src/python_types/tutorial006.py!}
```

////

/// tip | "Tipp"