```Python hl_lines="9  15-16  19-20  23-24"
{!> ../../docs_src/extra_models/tutorial002.py!}
```

////

## `Union` or `anyOf`

You can declare a response to be the `Union` of two or more types, that means, that the response would be any of them.

It will be defined in OpenAPI with `anyOf`.

    }


    @Override
    public String toString () {
        return new String("TransTransactNamedPipeResponse[" + super.toString() + "]");
    }


    /**
     * 
     * @return response data length
     */
    public int getResponseLength () {
        return getDataCount();
    }

* <abbr title="Startup and shutdown events">رویداد های راه اندازی و متوفق شدن<abbr>.
* تست کلاینت ساخته شده به روی HTTPX.
* **CORS**, GZip, فایل های استاتیک, <abbr title="Streaming responses">پاسخ های جریانی</abbr>.
* پشتیبانی از **نشست ها و کوکی ها**.
* 100% پوشش با تست.
* 100% کد براساس type annotate ها.

## ویژگی های Pydantic

    "info": {
        "title": "FastAPI",
        "version": "0.1.0"
    },
    "paths": {
        "/items/": {
            "get": {
                "responses": {
                    "200": {
                        "description": "Successful Response",
                        "content": {
                            "application/json": {



...
```

#### OpenAPI의 용도

   * to stop requests. You could poll for lifecycle changes in a work loop:
   *
   * <pre>
   *   public void run() {
   *     while ({@link #isRunning()}) {
   *       // perform a unit of work
   *     }
   *   }
   * </pre>
   *
   * <p>...or you could respond to stop requests by implementing {@link #triggerShutdown()}, which

   * Removes a <i>single</i> occurrence of the specified element from this multiset, if present.
   *
   * <p>This method refines {@link Collection#remove} to further specify that it <b>may not</b>
   * throw an exception in response to {@code element} being null or of the wrong type.
   *
   * <p>To both remove the element and obtain the previous count of that element, use {@link
   * #remove(Object, int) remove}{@code (element, 1)} instead.
   *

    with patch("json.loads", side_effect=Exception):
        response = client.post("/items/", json={"test": "test2"})
        assert response.status_code == 400, response.text


def test_openapi_schema(client: TestClient):
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == {
        "openapi": "3.1.0",

import json
from typing import Any, Dict, Optional

from fastapi.encoders import jsonable_encoder
from starlette.responses import HTMLResponse
from typing_extensions import Annotated, Doc

swagger_ui_default_parameters: Annotated[
    Dict[str, Any],
    Doc(
        """
        Default configurations for Swagger UI.

        You can use it as a template to add any other configurations needed.
        """
    ),
] = {

    with patch("json.loads", side_effect=Exception):
        response = client.post("/items/", json={"test": "test2"})
        assert response.status_code == 400, response.text


@needs_py310
def test_openapi_schema(client: TestClient):
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == {
        "openapi": "3.1.0",

import org.codelibs.fess.util.RenderDataUtil;
import org.dbflute.optional.OptionalEntity;
import org.dbflute.optional.OptionalThing;
import org.lastaflute.web.Execute;
import org.lastaflute.web.response.HtmlResponse;
import org.lastaflute.web.response.render.RenderData;
import org.lastaflute.web.ruts.process.ActionRuntime;
import org.lastaflute.web.validation.VaMessenger;

import jakarta.annotation.Resource;

/**
 * @author shinsuke