导入你想要使用的 `Response` 类（子类）然后在 *路径操作装饰器* 中声明它。

```Python hl_lines="2 7"
{!../../docs_src/custom_response/tutorial001b.py!}
```

/// info | "提示"

参数 `response_class` 也会用来定义响应的「媒体类型」。

在这个例子中，HTTP 头的 `Content-Type` 会被设置成 `application/json`。

并且在 OpenAPI 文档中也会这样记录。

///

/// tip | "小贴士"

    }


def test_openapi_schema():
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == {
        "openapi": "3.1.0",
        "info": {"title": "FastAPI", "version": "0.1.0"},
        "paths": {
            "/user/": {
                "post": {
                    "summary": "Create User",
                    "operationId": "create_user_user__post",

def test_openapi_schema():
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == {
        "openapi": "3.1.0",
        "info": {"title": "FastAPI", "version": "0.1.0"},
        "paths": {
            "/items/{item_id}": {
                "get": {
                    "responses": {
                        "404": {"description": "Item not found"},

        super(context);
    }

    @Override
    protected void processWebInfLib() throws LifecycleException {
        super.processWebInfLib();

        final WebResource[] possibleJars = listResources("/WEB-INF/plugin", false);

        for (final WebResource possibleJar : possibleJars) {
            if (possibleJar.isFile() && possibleJar.getName().endsWith(".jar")) {

Com ele, você pode usar o <a href="https://docs.pytest.org/" class="external-link" target="_blank">pytest</a> diretamente com **FastAPI**.

## Usando `TestClient`

/// info | "Informação"

Para usar o `TestClient`, primeiro instale o <a href="https://www.python-httpx.org" class="external-link" target="_blank">`httpx`</a>.

def test_openapi_schema():
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == {
        "openapi": "3.1.0",
        "info": {"title": "FastAPI", "version": "0.1.0"},
        "paths": {
            "/items/": {
                "get": {
                    "responses": {
                        "200": {

### 実行

以下のコマンドでサーバーを起動します:

<div class="termy">

```console
$ uvicorn main:app --reload

INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
INFO:     Started reloader process [28720]
INFO:     Started server process [28722]
INFO:     Waiting for application startup.
INFO:     Application startup complete.
```

</div>

<details markdown="1">

# Request Files

You can define files to be uploaded by the client using `File`.

/// info

To receive uploaded files, first install <a href="https://github.com/Kludex/python-multipart" class="external-link" target="_blank">`python-multipart`</a>.

Make sure you create a [virtual environment](../virtual-environments.md){.internal-link target=_blank}, activate it, and then install it, for example:

```console
$ pip install python-multipart
```

```JSON
{
    "name": "Foo",
    "price": 50.2
}
```

/// info | "정보"

FastAPI는 이를 위해 Pydantic 모델의 `.dict()`의 <a href="https://docs.pydantic.dev/latest/concepts/serialization/#modeldict" class="external-link" target="_blank"> `exclude_unset` 매개변수</a>를 사용합니다.

///

/// info | "정보"

아래 또한 사용할 수 있습니다:

* `response_model_exclude_defaults=True`

                    val v2Jar = v2.tasks.named("jar")
                    val newUpgradedPropertiesFile = layout.buildDirectory.file("gradle-api-info/new-upgraded-properties.json")
                    val oldUpgradedPropertiesFile = layout.buildDirectory.file("gradle-api-info/old-upgraded-properties.json")
                    val extractGradleApiInfo = tasks.register<ExtractGradleApiInfoTask>("extractGradleApiInfo") {