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  1. docs/en/docs/tutorial/query-params-str-validations.md

    As in this case (without using `Annotated`) we have to replace the default value `None` in the function with `Query()`, we now need to set the default value with the parameter `Query(default=None)`, it serves the same purpose of defining that default value (at least for FastAPI).
    
    So:
    
    ```Python
    q: Union[str, None] = Query(default=None)
    ```
    
    ...makes the parameter optional, with a default value of `None`, the same as:
    
    ```Python
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  2. docs/em/docs/tutorial/query-params-str-validations.md

        ```
    
    👥 ✔️ ❎ 🔢 💲 `None` 🔢 ⏮️ `Query()`, 👥 💪 🔜 ⚒ 🔢 💲 ⏮️ 🔢 `Query(default=None)`, ⚫️ 🍦 🎏 🎯 ⚖ 👈 🔢 💲.
    
    :
    
    ```Python
    q: Union[str, None] = Query(default=None)
    ```
    
    ...⚒ 🔢 📦, 🎏:
    
    ```Python
    q: Union[str, None] = None
    ```
    
    & 🐍 3️⃣.1️⃣0️⃣ & 🔛:
    
    ```Python
    q: str | None = Query(default=None)
    ```
    
    ...⚒ 🔢 📦, 🎏:
    
    ```Python
    q: str | None = None
    ```
    
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  3. docs/fr/docs/tutorial/query-params-str-validations.md

    Comme nous devons remplacer la valeur par défaut `None` dans la fonction par `Query()`, nous pouvons maintenant définir la valeur par défaut avec le paramètre `Query(default=None)`, il sert le même objectif qui est de définir cette valeur par défaut.
    
    Donc :
    
    ```Python
    q: Union[str, None] = Query(default=None)
    ```
    
    ... rend le paramètre optionnel, et est donc équivalent à :
    
    ```Python
    q: Union[str, None] = None
    ```
    
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  4. docs/de/docs/tutorial/query-params-str-validations.md

    <img src="/img/tutorial/query-params-str-validations/image02.png">
    
    ### Query-Parameter-Liste / Mehrere Werte mit Defaults
    
    Und Sie können auch eine Default-`list`e von Werten definieren, wenn keine übergeben werden:
    
    === "Python 3.9+"
    
        ```Python hl_lines="9"
        {!> ../../../docs_src/query_params_str_validations/tutorial012_an_py39.py!}
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  5. docs/ru/docs/tutorial/query-params-str-validations.md

    Таким образом:
    
    ```Python
    q: Union[str, None] = Query(default=None)
    ```
    
    ...делает параметр необязательным со значением по умолчанию `None`, также как это делает:
    
    ```Python
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  6. docs/zh/docs/tutorial/query-params-str-validations.md

    ```
    
    由于我们必须用 `Query(default=None)` 替换默认值 `None`,`Query` 的第一个参数同样也是用于定义默认值。
    
    所以:
    
    ```Python
    q: Union[str, None] = Query(default=None)
    ```
    
    ...使得参数可选,等同于:
    
    ```Python
    q: str = None
    ```
    
    但是 `Query` 显式地将其声明为查询参数。
    
    然后,我们可以将更多的参数传递给 `Query`。在本例中,适用于字符串的 `max_length` 参数:
    
    ```Python
    q: Union[str, None] = Query(default=None, max_length=50)
    ```
    
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