{* ../../docs_src/request_files/tutorial001_an_py310.py hl[9] *}

/// info | Informação

`File` é uma classe que herda diretamente de `Form`.

Mas lembre-se que quando você importa `Query`, `Path`, `File` e outros de `fastapi`, eles são, na verdade, funções que retornam classes especiais.

///

/// tip | Dica

    TF_CheckpointReader* reader, const char* name, TF_Status* status);

// TF_NewAttrBuilder() returns an object that you can set attributes on as
// though it were an op. This allows querying properties of that op for
// type-checking purposes like if the op will run on a particular device type.
typedef struct TF_AttrBuilder TF_AttrBuilder;
TF_CAPI_EXPORT extern TF_AttrBuilder* TF_NewAttrBuilder(const char* op_name);

    /**
     * Function code to request resilient handle for network failures
     */
    public static final int FSCTL_LRM_REQUEST_RESILENCY = 0x001401D4;
    /**
     * Function code to query network interface information
     */
    public static final int FSCTL_QUERY_NETWORK_INTERFACE_INFO = 0x001401FC;
    /**
     * Function code to set a reparse point on a file
     */

### Paramètres Pydantic v1 { #pydantic-v1-parameters }

Si vous devez utiliser certains des outils spécifiques à FastAPI pour les paramètres comme `Body`, `Query`, `Form`, etc., avec des modèles Pydantic v1, vous pouvez les importer depuis `fastapi.temp_pydantic_v1_params` le temps de terminer la migration vers Pydantic v2 :

在上面的示例中，输入模型是 Pydantic v1 模型，输出模型（在 `response_model=ItemV2` 中定义）是 Pydantic v2 模型。

### Pydantic v1 参数 { #pydantic-v1-parameters }

如果你需要在 Pydantic v1 模型中使用 FastAPI 特有的参数工具，如 `Body`、`Query`、`Form` 等，在完成向 Pydantic v2 的迁移前，可以从 `fastapi.temp_pydantic_v1_params` 导入它们：

{* ../../docs_src/pydantic_v1_in_v2/tutorial004_an_py310.py hl[4,18] *}

### 分步迁移 { #migrate-in-steps }

/// tip | 提示

					Token: r.Form.Get("id_token"),
				}, nil
			}
		} else {
			getWebTokenExpiry = func() (*credentials.WebIdentityToken, error) {
				oauth2Token, err := config.Exchange(ctx, r.URL.Query().Get("code"))
				if err != nil {
					return nil, err
				}
				if !oauth2Token.Valid() {
					return nil, errors.New("invalid token")
				}

				return &credentials.WebIdentityToken{

 * class is symmetric with {@link java.net.InetAddress}.
 *
 *
 *  * <b>About NetBIOS:</b> The NetBIOS name
 * service is a dynamic distributed service that allows hosts to resolve
 * names by broadcasting a query, directing queries to a server such as
 * Samba or WINS. NetBIOS is currently the primary networking layer for
 * providing name service, datagram service, and session service to the

{* ../../docs_src/background_tasks/tutorial002_an_py310.py hl[13,15,22,25] *}

Neste exemplo, as mensagens serão escritas no arquivo `log.txt` *após* o envio da resposta.

Se houver uma query na request, ela será registrada em uma tarefa em segundo plano.

E então outra tarefa em segundo plano gerada na *função de operação de rota* escreverá uma mensagem usando o parâmetro de path `email`.

# 基准测试 { #benchmarks }

第三方机构 TechEmpower 的基准测试表明在 Uvicorn 下运行的 **FastAPI** 应用程序是 [可用的最快的 Python 框架之一](https://www.techempower.com/benchmarks/#section=test&runid=7464e520-0dc2-473d-bd34-dbdfd7e85911&hw=ph&test=query&l=zijzen-7)，仅次于 Starlette 和 Uvicorn 本身（由 FastAPI 内部使用）。

但是在查看基准得分和对比时，请注意以下几点。

## 基准测试和速度 { #benchmarks-and-speed }

当你查看基准测试时，几个不同类型的工具被等效地做比较是很常见的情况。

具体来说，是将 Uvicorn，Starlette 和 FastAPI 一起比较（在许多其它工具中）。

### Pydantic v1 Parametreleri { #pydantic-v1-parameters }

Pydantic v1 modelleriyle `Body`, `Query`, `Form` vb. parametreler için FastAPI'ye özgü bazı araçları kullanmanız gerekiyorsa, Pydantic v2'ye geçişi tamamlayana kadar bunları `fastapi.temp_pydantic_v1_params` içinden import edebilirsiniz: