@app.get("/")
async def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
async def read_item(item_id: int, q: Optional[str] = None):
    return {"item_id": item_id, "q": q}
```

**Nota**:

e vuoi approfondire, consulta la sezione  _"In a hurry?"_ su <a href="https://fastapi.tiangolo.com/async/#in-a-hurry" target="_blank">`async` e `await` nella documentazione</a>.

</details>

    serverReaderWithCompression.processNextFrame()
    callback.assertTextMessage("Hello")
  }

  @Test fun serverWithCompressionSimpleCompressedHello() {
    data.write("c18760b420bb92fced72a9b320".decodeHex()) // Hello
    serverReaderWithCompression.processNextFrame()
    callback.assertTextMessage("Hello")
  }

  @Test fun clientFramePayloadShort() {
    data.write("817E000548656c6c6f".decodeHex()) // Hello

    assertThrows(NullPointerException.class, () -> helper.add(null, "Hello"));
  }

  @GwtIncompatible // Class names are obfuscated in GWT
  public void testToString_addWithNullValue() {
    final String result = MoreObjects.toStringHelper(new TestClass()).add("Hello", null).toString();

    assertEquals("TestClass{Hello=null}", result);
  }

  public void testToStringLenient_addWithNullValue() {

    client.webSocket!!.finishReader()
    server.listener.assertClosed(1000, "Hello!")
    client.listener.assertClosed(1000, "Goodbye!")
  }

  @Test
  fun clientCloseThenMethodsReturnFalse() {
    client.webSocket!!.close(1000, "Hello!")
    assertThat(client.webSocket!!.close(1000, "Hello!")).isFalse()
    assertThat(client.webSocket!!.send("Hello!")).isFalse()
  }

  @Test
  fun clientCloseWith0Fails() {

    assertThat(body.string()).isEqualTo("hello")
  }

  @Test
  fun stringBomUtf8() {
    val body = body("efbbbf68656c6c6f")
    assertThat(body.string()).isEqualTo("hello")
  }

  @Test
  fun stringBomUtf16Be() {
    val body = body("feff00680065006c006c006f")
    assertThat(body.string()).isEqualTo("hello")
  }

  @Test
  fun stringBomUtf16Le() {
    val body = body("fffe680065006c006c006f00")

    }
  }

  @Test
  fun singlePart() {
    val expected =
      """
      |--123
      |
      |Hello, World!
      |--123--
      |
      """.trimMargin().replace("\n", "\r\n")
    val body =
      MultipartBody.Builder("123")
        .addPart("Hello, World!".toRequestBody(null))
        .build()
    assertThat(body.boundary).isEqualTo("123")

    serverIpv4.enqueue(
      MockResponse(body = "unexpected call to IPv4"),
    )
    serverIpv6.enqueue(
      MockResponse(body = "hello from IPv6"),
    )

    val call = client.newCall(Request(url))
    val response = call.execute()
    assertThat(response.body.string()).isEqualTo("hello from IPv6")

    // In the process we made one successful connection attempt.

		filterRuleList FilterRuleList
		expectedResult string
	}{
		{FilterRuleList{}, ""},
		{FilterRuleList{[]FilterRule{{"prefix", "Hello/世界"}}}, "Hello/世界*"},
		{FilterRuleList{[]FilterRule{{"suffix", "foo/bar"}}}, "*foo/bar"},
		{FilterRuleList{[]FilterRule{{"prefix", "Hello/世界"}, {"suffix", "foo/bar"}}}, "Hello/世界*foo/bar"},
	}

	for i, testCase := range testCases {
		result := testCase.filterRuleList.Pattern()

$ echo "Hello $MY_NAME"

Hello Wade Wilson
```

</div>

////

//// tab | Windows PowerShell

<div class="termy">

```console
// Erstelle eine Umgebungsvariable MY_NAME
$ $Env:MY_NAME = "Wade Wilson"

// Verwende sie mit anderen Programmen, etwa
$ echo "Hello $Env:MY_NAME"

Hello Wade Wilson
```

</div>

////

items:
- apiVersion: apps/v1
  kind: Deployment
  metadata:
    labels:
      app: hello
      version: v1
    name: hello-v1
  spec:
    replicas: 1
    template:
      metadata:
        labels:
          app: hello
          version: v1
      spec:
        containers:
        - name: hello
          image: istio/examples-hello
          imagePullPolicy: IfNotPresent
          ports: