### Required, can be `None` { #required-can-be-none }

You can declare that a parameter can accept `None`, but that it's still required. This would force clients to send a value, even if the value is `None`.

To do that, you can declare that `None` is a valid type but simply do not declare a default value:

			c.client.Endpoints[0]: madmin.ItemOnline,
		}, nil
	}

	type Result struct {
		Endpoint  string
		ItemState madmin.ItemState
	}

	var wg sync.WaitGroup
	results := make([]Result, len(c.client.Endpoints))
	for i := range c.client.Endpoints {
		wg.Add(1)
		go func(i int) {
			defer wg.Done()

			client := kes.Client{
				Endpoints:  []string{c.client.Endpoints[i]},
				HTTPClient: c.client.HTTPClient,

    yield {"msg": "hello"}
    yield {"msg": "world"}


app.include_router(router, prefix="/api")


@pytest.fixture(name="client")
def client_fixture():
    with TestClient(app) as c:
        yield c


def test_async_generator_with_model(client: TestClient):
    response = client.get("/items/stream")
    assert response.status_code == 200
    assert response.headers["content-type"] == "text/event-stream; charset=utf-8"

@pytest.fixture(
    name="client",
    params=[
        "tutorial001_an_py310",
    ],
)
def get_client(request: pytest.FixtureRequest):
    mod = importlib.import_module(
        f"docs_src.authentication_error_status_code.{request.param}"
    )

    client = TestClient(mod.app)
    return client


def test_get_me(client: TestClient):

    /**
     * Constructor.
     * @param client OpenSearch client
     * @param settings Suggest settings
     */
    public AnalyzerConverter(final Client client, final SuggestSettings settings) {
        this.client = client;
        this.settings = settings;
        analyzerSettings = settings.analyzer();
    }

    @Override
    public void init() throws IOException {
        // nothing
    }

    @Override

    assert response.status_code == 200, response.text
    response = client.get("/query_examples/")
    assert response.status_code == 200, response.text
    response = client.get("/query_example_examples/")
    assert response.status_code == 200, response.text
    response = client.get("/header_example/")
    assert response.status_code == 200, response.text
    response = client.get("/header_examples/")

### Client Binaries

filename | sha512 hash
-------- | -----------
[kubernetes-client-darwin-amd64.tar.gz](https://dl.k8s.io/v1.33.10/kubernetes-client-darwin-amd64.tar.gz) | 3c253e852a007f4c5a7c4d01eda3ee18e29de72e08b3c53fc398ddb0432f82dee598c9212c3ff0c631eba7ef2de30b75d997d3ee0ed612f80f03b15bd7ca7b3f

    return StreamingResponse(iter_data())


client = TestClient(app)


def test_regular_no_stream():
    response = client.get("/data")
    assert response.json() == ["foo", "bar", "baz"]


def test_stream_simple():
    response = client.get("/stream-simple")
    assert response.text == "xyz"


def test_stream_session():
    response = client.get("/stream-session")
    assert response.text == "foobarbaz"

    server.enqueue(MockResponse(body = "abc2"))

    val request = Request(server.url("/"))

    client.newCall(request).execute().use { response ->
      assertEquals(200, response.code)
    }

    client.connectionPool.evictAll()
    assertEquals(0, client.connectionPool.connectionCount())

    // Force reuse. This appears flaky (30% of the time) even though sessions are reused.

    with pytest.raises(RuntimeError):
        client.get("/server-error")


def test_override_server_error_exception_response():
    client = TestClient(app, raise_server_exceptions=False)
    response = client.get("/server-error")
    assert response.status_code == 500
    assert response.json() == {"exception": "server-error"}


def test_traceback_for_dependency_with_yield():
    client = TestClient(app, raise_server_exceptions=True)