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  1. fastapi/security/oauth2.py

            """
            return HTTPException(
                status_code=HTTP_401_UNAUTHORIZED,
                detail="Not authenticated",
                headers={"WWW-Authenticate": "Bearer"},
            )
    
        async def __call__(self, request: Request) -> Optional[str]:
            authorization = request.headers.get("Authorization")
            if not authorization:
                if self.auto_error:
    Registered: Sun Dec 28 07:19:09 UTC 2025
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  2. docs/ru/docs/tutorial/first-steps.md

    В данном случае это асинхронная (`async`) функция.
    
    ---
    
    Вы также можете определить её как обычную функцию вместо `async def`:
    
    {* ../../docs_src/first_steps/tutorial003_py39.py hl[7] *}
    
    /// note | Примечание
    
    Если вы не знаете, в чём разница, посмотрите [Асинхронность: *"Нет времени?"*](../async.md#in-a-hurry){.internal-link target=_blank}.
    
    ///
    
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  3. docs/zh/docs/tutorial/first-steps.md

    这是一个 Python 函数。
    
    每当 **FastAPI** 接收一个使用 `GET` 方法访问 URL「`/`」的请求时这个函数会被调用。
    
    在这个例子中,它是一个 `async` 函数。
    
    ---
    
    你也可以将其定义为常规函数而不使用 `async def`:
    
    {* ../../docs_src/first_steps/tutorial003.py hl[7] *}
    
    /// note
    
    如果你不知道两者的区别,请查阅 [并发: *赶时间吗?*](../async.md#_1){.internal-link target=_blank}。
    
    ///
    
    ### 步骤 5:返回内容
    
    {* ../../docs_src/first_steps/tutorial001.py hl[8] *}
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  4. docs/en/mkdocs.yml

              show_symbol_type_heading: true
              show_symbol_type_toc: true
    nav:
    - FastAPI: index.md
    - features.md
    - Learn:
      - learn/index.md
      - python-types.md
      - async.md
      - environment-variables.md
      - virtual-environments.md
      - Tutorial - User Guide:
        - tutorial/index.md
        - tutorial/first-steps.md
        - tutorial/path-params.md
        - tutorial/query-params.md
    Registered: Sun Dec 28 07:19:09 UTC 2025
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  5. docs/fr/docs/index.md

    <details markdown="1">
    <summary>Ou utilisez <code>async def</code> ...</summary>
    
    Si votre code utilise `async` / `await`, utilisez `async def` :
    
    ```Python hl_lines="9  14"
    from typing import Union
    
    from fastapi import FastAPI
    
    app = FastAPI()
    
    
    @app.get("/")
    async def read_root():
        return {"Hello": "World"}
    
    
    @app.get("/items/{item_id}")
    Registered: Sun Dec 28 07:19:09 UTC 2025
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  6. docs/es/docs/index.md

    ```
    
    <details markdown="1">
    <summary>O usa <code>async def</code>...</summary>
    
    Si tu código usa `async` / `await`, usa `async def`:
    
    ```Python hl_lines="9  14"
    from typing import Union
    
    from fastapi import FastAPI
    
    app = FastAPI()
    
    
    @app.get("/")
    async def read_root():
        return {"Hello": "World"}
    
    
    @app.get("/items/{item_id}")
    async def read_item(item_id: int, q: Union[str, None] = None):
    Registered: Sun Dec 28 07:19:09 UTC 2025
    - Last Modified: Tue Dec 16 16:33:45 UTC 2025
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  7. docs/zh-hant/docs/index.md

    ```
    
    <details markdown="1">
    <summary>或可以使用 <code>async def</code>...</summary>
    
    如果你的程式使用 `async` / `await`,請使用 `async def`:
    
    ```Python hl_lines="9  14"
    from typing import Union
    
    from fastapi import FastAPI
    
    app = FastAPI()
    
    
    @app.get("/")
    async def read_root():
        return {"Hello": "World"}
    
    
    @app.get("/items/{item_id}")
    async def read_item(item_id: int, q: Union[str, None] = None):
    Registered: Sun Dec 28 07:19:09 UTC 2025
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  8. docs/pt/docs/index.md

    <details markdown="1">
    <summary>Ou use <code>async def</code>...</summary>
    
    Se seu código utiliza `async` / `await`, use `async def`:
    
    ```Python hl_lines="9  14"
    from typing import Union
    
    from fastapi import FastAPI
    
    app = FastAPI()
    
    
    @app.get("/")
    async def read_root():
        return {"Hello": "World"}
    
    
    @app.get("/items/{item_id}")
    async def read_item(item_id: int, q: Union[str, None] = None):
    Registered: Sun Dec 28 07:19:09 UTC 2025
    - Last Modified: Tue Dec 16 20:32:40 UTC 2025
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  9. fastapi/exceptions.py

        ## Example
    
        ```python
        from fastapi import FastAPI, HTTPException
    
        app = FastAPI()
    
        items = {"foo": "The Foo Wrestlers"}
    
    
        @app.get("/items/{item_id}")
        async def read_item(item_id: str):
            if item_id not in items:
                raise HTTPException(status_code=404, detail="Item not found")
            return {"item": items[item_id]}
        ```
        """
    
        def __init__(
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  10. docs/ja/docs/tutorial/background-tasks.md

    **FastAPI** は、`BackgroundTasks` 型のオブジェクトを作成し、そのパラメーターに渡します。
    
    ## タスク関数の作成
    
    バックグラウンドタスクとして実行される関数を作成します。
    
    これは、パラメーターを受け取ることができる単なる標準的な関数です。
    
    これは `async def` または通常の `def` 関数であり、**FastAPI** はこれを正しく処理します。
    
    ここで、タスク関数はファイル書き込みを実行します (メール送信のシミュレーション)。
    
    また、書き込み操作では `async` と `await` を使用しないため、通常の `def` で関数を定義します。
    
    {* ../../docs_src/background_tasks/tutorial001.py hl[6:9] *}
    
    ## バックグラウンドタスクの追加
    
    Registered: Sun Dec 28 07:19:09 UTC 2025
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