*/
      String key = (String) requireNonNull(e.nextElement());
      /*
       * requireNonNull is safe because the key came from propertyNames...
       *
       * ...except that it's possible for users to insert a string key with a non-string value, and
       * in that case, getProperty *will* return null.
       *
       * TODO(b/192002623): Handle that case: Either:
       *

       */
      String key = (String) requireNonNull(e.nextElement());
      /*
       * requireNonNull is safe because the key came from propertyNames...
       *
       * ...except that it's possible for users to insert a string key with a non-string value, and
       * in that case, getProperty *will* return null.
       *
       * TODO(b/192002623): Handle that case: Either:
       *

keepData","cleanData","dataAndEvents","deepDataAndEvents","srcElements","destElements","inPage","detach","append","prepend","insertBefore","before","after","replaceWith","replaceChild","appendTo","prependTo","insertAfter","replaceAll","original","insert","rnumnonpx","rcustomProp","getStyles","opener","getComputedStyle","swap","old","rboxStyle","curCSS","computed","width","minWidth","maxWidth","isCustomProp","getPropertyValue","pixelBoxStyles","addGetHookIf","conditionFn","hookFn","computeStyleTe...

# Release 2.21.0

## TensorFlow

<INSERT SMALL BLURB ABOUT RELEASE FOCUS AREA AND POTENTIAL TOOLCHAIN CHANGES>

### Breaking Changes

* <DOCUMENT BREAKING CHANGES HERE>
* <THIS SECTION SHOULD CONTAIN API, ABI AND BEHAVIORAL BREAKING CHANGES>

### Known Caveats

* <CAVEATS REGARDING THE RELEASE (BUT NOT BREAKING CHANGES).>
* <ADDING/BUMPING DEPENDENCIES SHOULD GO HERE>
* <KNOWN LACK OF SUPPORT ON SOME PLATFORM, SHOULD GO HERE>

    }


def test_valid_exclude_unset():
    response = client.get("/items/valid-exclude-unset")
    response.raise_for_status()
    assert response.json() == {"aliased_name": "valid", "price": 1.0}


def test_coerce_exclude_unset():
    response = client.get("/items/coerce-exclude-unset")
    response.raise_for_status()
    assert response.json() == {"aliased_name": "coerce", "price": 1.0}

```console
$ pip install email-validator
```

oder mit:

```console
$ pip install "pydantic[email]"
```

///

Wir verwenden dieses Modell, um sowohl unsere Eingabe- als auch Ausgabedaten zu deklarieren:

{* ../../docs_src/response_model/tutorial002_py310.py hl[16] *}

Wenn Sie es erzwingen müssen, verwenden Sie `OAuth2PasswordRequestFormStrict` anstelle von `OAuth2PasswordRequestForm`.

///

* Eine optionale `client_id` (benötigen wir für unser Beispiel nicht).
* Ein optionales `client_secret` (benötigen wir für unser Beispiel nicht).

/// info | Info

`OAuth2PasswordRequestForm` ist keine spezielle Klasse für **FastAPI**, so wie `OAuth2PasswordBearer`.

    assert response.status_code == 200
    assert response.json() == {
        "name": "Foo",
        "price": 50.5,
        "description": None,
        "tax": None,
    }


def test_post_with_str_float(client: TestClient):
    response = client.post("/items/", json={"name": "Foo", "price": "50.5"})
    assert response.status_code == 200
    assert response.json() == {
        "name": "Foo",

    response = client.get(path)
    assert response.status_code == 200
    assert response.json() == {"p": None}


@pytest.mark.parametrize(
    "path",
    ["/optional-str", "/model-optional-str"],
)
def test_optional_str(path: str):
    client = TestClient(app)
    client.cookies.set("p", "hello")
    response = client.get(path)
    assert response.status_code == 200
    assert response.json() == {"p": "hello"}

    response = client.get(path)
    assert response.status_code == 200, response.text
    assert response.json() == {"p": None}


@pytest.mark.parametrize(
    "path",
    ["/optional-list-str", "/model-optional-list-str"],
)
def test_optional_list_str(path: str):
    client = TestClient(app)
    response = client.get(path, headers=[("p", "hello"), ("p", "world")])
    assert response.status_code == 200