"name": "The Foo live"
        },
        {
            "url": "http://example.com/dave.jpg",
            "name": "The Baz"
        }
    ]
}
```

/// info

Notice how the `images` key now has a list of image objects.

///

## Deeply nested models

You can define arbitrarily deeply nested models:

//// tab | Python 3.10+

# 请求文件

`File` 用于定义客户端的上传文件。

/// info | "说明"

因为上传文件以「表单数据」形式发送。

所以接收上传文件，要预先安装 <a href="https://github.com/Kludex/python-multipart" class="external-link" target="_blank">`python-multipart`</a>。

例如： `pip install python-multipart`。

///

## 导入 `File`

从 `fastapi` 导入 `File` 和 `UploadFile`：

```Python hl_lines="1"
{!../../docs_src/request_files/tutorial001.py!}
```

## 定义 `File` 参数

pkg go/types, method (*Alias) String() string #63223
pkg go/types, method (*Alias) Underlying() Type #63223
pkg go/types, method (*Info) PkgNameOf(*ast.ImportSpec) *PkgName #62037
pkg go/types, method (Checker) PkgNameOf(*ast.ImportSpec) *PkgName #62037
pkg go/types, type Alias struct #63223
pkg go/types, type Info struct, FileVersions map[*ast.File]string #62605
pkg go/version, func Compare(string, string) int #62039

	entitlementsPath := filepath.Join(tmpdir, "Entitlements.plist")
	if err := os.WriteFile(entitlementsPath, []byte(entitlementsPlist()), 0744); err != nil {
		return err
	}
	if err := os.WriteFile(filepath.Join(appdir, "Info.plist"), []byte(infoPlist(pkgpath)), 0744); err != nil {
		return err
	}
	if err := os.WriteFile(filepath.Join(appdir, "ResourceRules.plist"), []byte(resourceRules), 0744); err != nil {
		return err
	}
	return nil

documentation générée automatiquement et interactive :

<img src="/img/tutorial/path-params/image01.png">

/// info

À nouveau, en utilisant uniquement les déclarations de type Python, **FastAPI** vous fournit automatiquement une documentation interactive (via Swagger UI).

            createSystemProperties(cmdList, propFile);

            final File baseDir = new File(servletContext.getRealPath("/WEB-INF")).getParentFile();

            if (logger.isInfoEnabled()) {
                logger.info("Crawler: \nDirectory={}\nOptions={}", baseDir, cmdList);
            }

            final JobProcess jobProcess = processHelper.startProcess(sessionId, cmdList, pb -> {
                pb.directory(baseDir);

     *     FutureCombiner}). Even if you don't care about the value of the future, you should
     *     typically check whether it failed: See <a
     *     href="https://errorprone.info/bugpattern/FutureReturnValueIgnored">https://errorprone.info/bugpattern/FutureReturnValueIgnored</a>.
     */
    public <C extends @Nullable Object> ListenableFuture<C> callAsync(
        AsyncCallable<C> combiner, Executor executor) {

                    .filter(str -> str != null && !str.isEmpty())
                    .forEach(request.getProjectActivation()::activateOptionalProject);
            LOGGER.info("Resuming from {} due to the --resume / -r feature.", propertyValue);
        }
    }

            } else {
                unresolvedOptionalSelectors.add(selector);
            }
        }

        if (!unresolvedOptionalSelectors.isEmpty()) {
            LOGGER.info("The requested optional projects {} do not exist.", unresolvedOptionalSelectors);
        }

        return resolvedOptionalProjects;
    }

Mas lembre-se que quando você importa `Query`, `Path`, `Header`, e outras de `fastapi`, elas são na verdade funções que retornam classes especiais.

///

/// info

Para declarar headers, você precisa usar `Header`, caso contrário, os parâmetros seriam interpretados como parâmetros de consulta.

///

## Conversão automática