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  1. docs/zh/docs/tutorial/dependencies/sub-dependencies.md

    # 子依赖项
    
    FastAPI 支持创建含**子依赖项**的依赖项。
    
    并且,可以按需声明任意**深度**的子依赖项嵌套层级。
    
    **FastAPI** 负责处理解析不同深度的子依赖项。
    
    ### 第一层依赖项
    
    下列代码创建了第一层依赖项:
    
    {* ../../docs_src/dependencies/tutorial005.py hl[8:9] *}
    
    这段代码声明了类型为 `str` 的可选查询参数 `q`,然后返回这个查询参数。
    
    这个函数很简单(不过也没什么用),但却有助于让我们专注于了解子依赖项的工作方式。
    
    ### 第二层依赖项
    
    接下来,创建另一个依赖项函数,并同时用该依赖项自身再声明一个依赖项(所以这也是一个「依赖项」):
    
    {* ../../docs_src/dependencies/tutorial005.py hl[13] *}
    
    这里重点说明一下声明的参数:
    
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  2. docs_src/async_tests/app_a_py39/main.py

    from fastapi import FastAPI
    
    app = FastAPI()
    
    
    @app.get("/")
    async def root():
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  3. docs_src/first_steps/tutorial003_py39.py

    from fastapi import FastAPI
    
    app = FastAPI()
    
    
    @app.get("/")
    def root():
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  4. docs_src/behind_a_proxy/tutorial001_01_py39.py

    from fastapi import FastAPI
    
    app = FastAPI()
    
    
    @app.get("/items/")
    def read_items():
    Registered: Sun Dec 28 07:19:09 UTC 2025
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  5. docs_src/sql_databases/tutorial002_py39.py

    from typing import Union
    
    from fastapi import Depends, FastAPI, HTTPException, Query
    from sqlmodel import Field, Session, SQLModel, create_engine, select
    
    
    class HeroBase(SQLModel):
        name: str = Field(index=True)
        age: Union[int, None] = Field(default=None, index=True)
    
    
    class Hero(HeroBase, table=True):
        id: Union[int, None] = Field(default=None, primary_key=True)
        secret_name: str
    
    
    class HeroPublic(HeroBase):
    Registered: Sun Dec 28 07:19:09 UTC 2025
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  6. tests/test_dependency_cache.py

    from fastapi import Depends, FastAPI, Security
    from fastapi.testclient import TestClient
    
    app = FastAPI()
    
    counter_holder = {"counter": 0}
    
    
    async def dep_counter():
        counter_holder["counter"] += 1
        return counter_holder["counter"]
    
    
    async def super_dep(count: int = Depends(dep_counter)):
        return count
    
    
    @app.get("/counter/")
    async def get_counter(count: int = Depends(dep_counter)):
        return {"counter": count}
    Registered: Sun Dec 28 07:19:09 UTC 2025
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  7. docs_src/websockets/tutorial002_an_py39.py

    from typing import Annotated, Union
    
    from fastapi import (
        Cookie,
        Depends,
        FastAPI,
        Query,
        WebSocket,
        WebSocketException,
        status,
    )
    from fastapi.responses import HTMLResponse
    
    app = FastAPI()
    
    html = """
    <!DOCTYPE html>
    <html>
        <head>
            <title>Chat</title>
        </head>
        <body>
            <h1>WebSocket Chat</h1>
            <form action="" onsubmit="sendMessage(event)">
    Registered: Sun Dec 28 07:19:09 UTC 2025
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  8. docs/zh/docs/tutorial/security/oauth2-jwt.md

    **高级用户指南**中将介绍如何使用 `scopes`,及如何把 `scopes` 集成至 **FastAPI**。
    
    ## 小结
    
    至此,您可以使用 OAuth2 和 JWT 等标准配置安全的 **FastAPI** 应用。
    
    几乎在所有框架中,处理安全问题很快都会变得非常复杂。
    
    有些包为了简化安全流,不得不在数据模型、数据库和功能上做出妥协。而有些过于简化的软件包其实存在了安全隐患。
    
    ---
    
    **FastAPI** 不向任何数据库、数据模型或工具做妥协。
    
    开发者可以灵活选择最适合项目的安全机制。
    
    还可以直接使用 `passlib` 和 `PyJWT` 等维护良好、使用广泛的包,这是因为 **FastAPI** 不需要任何复杂机制,就能集成外部的包。
    
    而且,**FastAPI** 还提供了一些工具,在不影响灵活、稳定和安全的前提下,尽可能地简化安全机制。
    
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  9. docs/tr/docs/tutorial/path-params.md

    ```JSON
    {"item_id":3}
    ```
    
    /// check | Ek bilgi
    
    Dikkatinizi çekerim ki, fonksiyonunuzun aldığı (ve döndürdüğü) değer olan `3` bir string `"3"` değil aksine bir Python `int`'idir.
    
    Bu tanımlamayla birlikte, **FastAPI** size otomatik istek <abbr title="HTTP isteği ile birlikte gelen string'i Python verisine dönüştürme">"ayrıştırma"</abbr> özelliği sağlar.
    
    ///
    
    ## Veri Doğrulama
    
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  10. docs/uk/docs/tutorial/path-params.md

    ```JSON
    {"item_id":3}
    ```
    
    /// check | Примітка
    
    Зверніть увагу, що значення, яке отримала (і повернула) ваша функція, — це `3`. Це Python `int`, а не рядок `"3"`.
    
    Отже, з таким оголошенням типу  **FastAPI**  автоматично виконує <abbr title="перетворення рядка, що надходить із HTTP-запиту, у типи даних Python">"парсинг"</abbr> запитів.
    
    ///
    
    ## <abbr title="Або валідація">Перевірка</abbr> даних
    
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