=== "Python 3.10+"

    ```Python hl_lines="1"
    {!> ../../../docs_src/python_types/tutorial009_py310.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="1  4"
    {!> ../../../docs_src/python_types/tutorial009.py!}
    ```

=== "Python 3.8+ alternative"

    ```Python hl_lines="1  4"
    {!> ../../../docs_src/python_types/tutorial009b.py!}
    ```

## 🌅 🎯

✅ 👉 🔢, ⚫️ ⏪ ✔️ 🆎 🔑:

```Python hl_lines="1"
{!../../../docs_src/python_types/tutorial003.py!}
```

↩️ 👨‍🎨 💭 🆎 🔢, 👆 🚫 🕴 🤚 🛠️, 👆 🤚 ❌ ✅:

<img src="/img/python-types/image04.png">

🔜 👆 💭 👈 👆 ✔️ 🔧 ⚫️, 🗜 `age` 🎻 ⏮️ `str(age)`:

```Python hl_lines="2"
{!../../../docs_src/python_types/tutorial004.py!}
```

## 📣 🆎

## より強い動機

この関数を見てください。すでに型ヒントを持っています:

```Python hl_lines="1"
{!../../../docs_src/python_types/tutorial003.py!}
```

エディタは変数の型を知っているので、補完だけでなく、エラーチェックをすることもできます。

<img src="https://fastapi.tiangolo.com/img/python-types/image04.png">

これで`age`を`str(age)`で文字列に変換して修正する必要があることがわかります:

```Python hl_lines="2"
{!../../../docs_src/python_types/tutorial004.py!}
```

## 型の宣言

=== "Python 3.8 і вище"

    ```Python hl_lines="1  4"
    {!> ../../../docs_src/python_types/tutorial009.py!}
    ```

=== "Python 3.8 і вище - альтернатива"

    ```Python hl_lines="1  4"
    {!> ../../../docs_src/python_types/tutorial009b.py!}
    ```

=== "Python 3.10 і вище"

    ```Python hl_lines="1"
    {!> ../../../docs_src/python_types/tutorial009_py310.py!}
    ```

Проверьте эту функцию, она уже имеет аннотации типов:

```Python hl_lines="1"
{!../../../docs_src/python_types/tutorial003.py!}
```

Поскольку редактор знает типы переменных, вы получаете не только дополнение, но и проверки ошибок:

<img src="/img/python-types/image04.png">

Теперь вы знаете, что вам нужно исправить, преобразовав `age` в строку с `str(age)`:

```Python hl_lines="2"
{!../../../docs_src/python_types/tutorial004.py!}
```

=== "Python 3.10+"

    ```Python hl_lines="1"
    {!> ../../../docs_src/python_types/tutorial009_py310.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="1  4"
    {!> ../../../docs_src/python_types/tutorial009.py!}
    ```

=== "Python 3.8+ alternative"

    ```Python hl_lines="1  4"
    {!> ../../../docs_src/python_types/tutorial009b.py!}
    ```

## 更多动机

下面是一个已经有类型提示的函数：

```Python hl_lines="1"
{!../../../docs_src/python_types/tutorial003.py!}
```

因为编辑器已经知道了这些变量的类型，所以不仅能对代码进行补全，还能检查其中的错误：

<img src="https://fastapi.tiangolo.com/img/python-types/image04.png">

现在你知道了必须先修复这个问题，通过 `str(age)` 把 `age` 转换成字符串：

```Python hl_lines="2"
{!../../../docs_src/python_types/tutorial004.py!}
```

## 声明类型

=== "Python 3.10+"

    ```Python hl_lines="1"
    {!> ../../../docs_src/python_types/tutorial009_py310.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="1  4"
    {!> ../../../docs_src/python_types/tutorial009.py!}
    ```

=== "Python 3.8+ Alternative"

    ```Python hl_lines="1  4"
    {!> ../../../docs_src/python_types/tutorial009b.py!}
    ```

```Python hl_lines="1"
{!../../../docs_src/python_types/tutorial003.py!}
```

Editör değişkenlerin tiplerini bildiğinden, yalnızca otomatik tamamlama değil, hata kontrolleri de sağlar:

<img src="/img/python-types/image04.png">

Artık `age` değişkenini `str(age)` olarak kullanmanız gerektiğini biliyorsunuz:

```Python hl_lines="2"
{!../../../docs_src/python_types/tutorial004.py!}

```Python hl_lines="1"
{!../../../docs_src/python_types/tutorial003.py!}
```

Como o editor conhece os tipos de variáveis, você não apenas obtém a conclusão, mas também as verificações de erro:

<img src="/img/python-types/image04.png">

Agora você sabe que precisa corrigí-lo, converta `age` em uma string com `str (age)`:

```Python hl_lines="2"
{!../../../docs_src/python_types/tutorial004.py!}