text=foo...

  private @interface ExampleAnnotation {}

  private enum AnEnum {
    @ExampleAnnotation
    FOO,
    BAR
  }

  @J2ktIncompatible
  public void testGetField() {
    Field foo = Enums.getField(AnEnum.FOO);
    assertThat(foo.getName()).isEqualTo("FOO");
    assertTrue(foo.isAnnotationPresent(ExampleAnnotation.class));

    Field bar = Enums.getField(AnEnum.BAR);

{* ../../docs_src/path_params/tutorial001_py310.py hl[6:7] *}

パスパラメータ `item_id` の値は、引数 `item_id` として関数に渡されます。

したがって、この例を実行して [http://127.0.0.1:8000/items/foo](http://127.0.0.1:8000/items/foo) にアクセスすると、次のレスポンスが表示されます。

```JSON
{"item_id":"foo"}
```

## 型付きパスパラメータ { #path-parameters-with-types }

標準のPythonの型アノテーションを使用して、関数内のパスパラメータの型を宣言できます:

{* ../../docs_src/path_params/tutorial002_py310.py hl[7] *}

KIND, either express or implied.  See the License for the
specific language governing permissions and limitations
under the License.
-->

<project>
  <modelVersion>4.0.0</modelVersion>
  <artifactId>foo</artifactId>
  <groupId>foo</groupId>
  <version>99.44</version>
  <packaging>bleh</packaging>

  <build>
    <pluginManagement>
      <plugins>
        <plugin>

      ImmutableSet.of(
          // keep-sorted start
          "dominio.com.co",
          "foo.bar.ca",
          "foo.bar.co.il",
          "foo.bar.com",
          "foo.blogspot.co.uk",
          "foo.blogspot.com",
          "foo.ca",
          "foo.eDu.au",
          "foo.uk.com",
          "home.netscape.com",
          "pvt.k12.ca.us",
          "state.CA.us",

    assertThat(mapCache.get("key")).isEqualTo("new value");
  }

  @Test
  public void testRemoveEqualKeyWithDifferentReference() {
    String fooReference1 = new String("foo");
    String fooReference2 = new String("foo");
    assertThat(fooReference1).isNotSameInstanceAs(fooReference2);

    assertThat(mapCache.put(fooReference1, "bar")).isNull();

在这种情况下，**FastAPI** 将期望像这样的请求体：

```JSON hl_lines="2"
{
    "item": {
        "name": "Foo",
        "description": "The pretender",
        "price": 42.0,
        "tax": 3.2
    }
}
```

而不是：

```JSON
{
    "name": "Foo",
    "description": "The pretender",
    "price": 42.0,
    "tax": 3.2
}
```

## 总结 { #recap }

from fastapi import FastAPI

app = FastAPI(openapi_url="/api/v1/openapi.json")


@app.get("/items/")
async def read_items():

 *
 * <p>For example, an XML escaper would convert the literal string {@code "Foo<Bar>"} into {@code
 * "Foo&lt;Bar&gt;"} to prevent {@code "<Bar>"} from being confused with an XML tag. When the
 * resulting XML document is parsed, the parser API will return this text as the original literal
 * string {@code "Foo<Bar>"}.
 *
 * <p>An {@code Escaper} instance is required to be stateless, and safe when used concurrently by

from typing import Annotated, Any

import pytest
from fastapi import Depends, FastAPI, WebSocket
from fastapi.testclient import TestClient


class Session:
    def __init__(self) -> None:
        self.data = ["foo", "bar", "baz"]
        self.open = True

    def __iter__(self) -> Generator[str, None, None]:
        for item in self.data:
            if self.open:
                yield item
            else: