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

## 🔢 🔬: 👑 🌘 ⚖️ 🌓

⏮️ `Query` & `Path` (& 🎏 👆 🔜 👀 ⏪) 👆 💪 📣 🔢 ⚛.

📥, ⏮️ `ge=1`, `item_id` 🔜 💪 🔢 🔢 "`g`🅾 🌘 ⚖️ `e`🅾" `1`.

```Python hl_lines="8"
{!../../docs_src/path_params_numeric_validations/tutorial004.py!}
```

## 🔢 🔬: 🌘 🌘 & 🌘 🌘 ⚖️ 🌓

🎏 ✔:

```Python hl_lines="7"
{!../../docs_src/first_steps/tutorial001.py!}
```

Это обычная Python функция.

**FastAPI** будет вызывать её каждый раз при получении `GET` запроса к URL "`/`".

В данном случае это асинхронная функция.

---

Вы также можете определить ее как обычную функцию вместо `async def`:

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

/// note | "Технические детали"

```Python hl_lines="7"
{!../../docs_src/first_steps/tutorial001.py!}
```

👉 🐍 🔢.

⚫️ 🔜 🤙 **FastAPI** 🕐❔ ⚫️ 📨 📨 📛 "`/`" ⚙️ `GET` 🛠️.

👉 💼, ⚫️ `async` 🔢.

---

👆 💪 🔬 ⚫️ 😐 🔢 ↩️ `async def`:

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

/// note

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

/// note | "Not"

Eğer farkı bilmiyorsanız, [Async: *"Aceleniz mi var?"*](../async.md#in-a-hurry){.internal-link target=_blank} sayfasını kontrol edebilirsiniz.

///

### Adım 5: İçeriği Geri Döndürün

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

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

/// note | Nota

Si no sabes la diferencia, revisa el [Async: *"¿Tienes prisa?"*](../async.md#tienes-prisa){.internal-link target=_blank}.

///

### Paso 5: devuelve el contenido

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

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

/// note | "Nota"

Se você não sabe a diferença, verifique o [Async: *"Com pressa?"*](../async.md#com-pressa){.internal-link target=_blank}.

///

### Passo 5: retorne o conteúdo

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

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

/// note

Si vous ne connaissez pas la différence, allez voir la section [Concurrence : *"Vous êtes pressés ?"*](../async.md#vous-etes-presses){.internal-link target=_blank}.

///

### Étape 5 : retourner le contenu

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

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

Exécuter ce programe affiche :

```
John Doe
```

La fonction :

* Prend un `first_name` et un `last_name`.
* Convertit la première lettre de chaque paramètre en majuscules grâce à `title()`.
* Concatène les résultats avec un espace entre les deux.

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

### Limitations

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

/// note | "Hinweis"

Wenn Sie den Unterschied nicht kennen, lesen Sie [Async: *„In Eile?“*](../async.md#in-eile){.internal-link target=_blank}.

///

### Schritt 5: den Inhalt zurückgeben

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

먼저 `fastapi`에서 `Path`를 임포트합니다:

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

## 메타데이터 선언

`Query`에 동일한 매개변수를 선언할 수 있습니다.

예를 들어, `title` 메타데이터 값을 경로 매개변수 `item_id`에 선언하려면 다음과 같이 입력할 수 있습니다:

```Python hl_lines="10"
{!../../docs_src/path_params_numeric_validations/tutorial001.py!}
```

/// note | "참고"

경로 매개변수는 경로의 일부여야 하므로 언제나 필수적입니다.