Переменные окружения могут быть полезны для работы с **настройками** приложений, как часть **установки** Python и т.д.

## Создание и использование переменных окружения { #create-and-use-env-vars }

Можно **создавать** и использовать переменные окружения в **оболочке (терминале)**, не прибегая к помощи Python:

//// tab | Linux, macOS, Windows Bash

<div class="termy">

```console

var ErrNoEntriesFound = errors.New("No entries found for this key")

// ErrDomainMissing - Indicates domain is missing
var ErrDomainMissing = errors.New("domain is missing")

const etcdPathSeparator = "/"

// create a new coredns service record for the bucket.
func newCoreDNSMsg(ip string, port string, ttl uint32, t time.Time) ([]byte, error) {
	return json.Marshal(&SrvRecord{
		Host:         ip,
		Port:         json.Number(port),

        when(mockConfig.getSendBufferSize()).thenReturn(65536);
        when(mockContext.getConfig()).thenReturn(mockConfig);
    }

    @Test
    @DisplayName("Should create response with configuration")
    void testConstructor() {
        // When
        Smb2NegotiateResponse resp = new Smb2NegotiateResponse(mockConfig);

        // Then
        assertNotNull(resp);

gradient-bg($color) {\n  @if $enable-gradients {\n    background: $color linear-gradient(180deg, mix($body-bg, $color, 15%), $color) repeat-x;\n  } @else {\n    background-color: $color;\n  }\n}\n\n// Horizontal gradient, from left to right\n//\n// Creates two color stops, start and end, by specifying a color and position for each color stop.\n@mixin gradient-x($start-color: $gray-700, $end-color: $gray-800, $start-percent: 0%, $end-percent: 100%) {\n  background-image: linear-gradient(to right, $start-color...

oggleClass("ml-2 ml-auto"),t.append(i)}e.append(t),null!=this._config.body&&e.append(n.default('<div class="toast-body" />').html(this._config.body)),n.default(this._getContainerId()).prepend(e);var o=n.default("body");o.trigger(n.default.Event("created.lte.toasts")),e.toast("show"),this._config.autoremove&&e.on("hidden.bs.toast",(function(){n.default(this).delay(200).remove(),o.trigger(n.default.Event("removed.lte.toasts"))}))},t._getContainerId=function(){return this._config.position==xt?"#toa...

     * @throws Exception
     */
    public void testFromBinaryToObject_PermissiveFilter() throws Exception {
        final ObjectInputFilter permissiveFilter = SerializeUtil.createPermissiveFilter();

        // Create a custom class instance
        final TestSerializableClass obj = new TestSerializableClass("test", 123);
        final byte[] binary = SerializeUtil.fromObjectToBinary(obj);

        // Should work with permissive filter

{* ../../docs_src/background_tasks/tutorial001_py39.py hl[1,13] *}

**FastAPI** erstellt für Sie das Objekt vom Typ `BackgroundTasks` und übergibt es als diesen Parameter.

## Eine Taskfunktion erstellen { #create-a-task-function }

Erstellen Sie eine Funktion, die als Hintergrundtask ausgeführt werden soll.

Es handelt sich schlicht um eine Standard-Funktion, die Parameter empfangen kann.

// 32-bit decimal input.
func ExampleScanner_custom() {
	// An artificial input source.
	const input = "1234 5678 1234567901234567890"
	scanner := bufio.NewScanner(strings.NewReader(input))
	// Create a custom split function by wrapping the existing ScanWords function.
	split := func(data []byte, atEOF bool) (advance int, token []byte, err error) {
		advance, token, err = bufio.ScanWords(data, atEOF)

            // Given: Original value that fits in byte range
            int originalValue = 150;
            NdrShort ndrShort1 = new NdrShort(originalValue);

            // Create separate mocks for encoding and decoding to simulate real buffer
            NdrBuffer encodeBuffer = mock(NdrBuffer.class);
            NdrBuffer decodeBuffer = mock(NdrBuffer.class);

    SessionScope sessionScope;

    @Inject
    SettingsBuilder settingsBuilder;

    @Inject
    ToolchainsBuilder toolchainsBuilder;

    @BeforeEach
    void setup() {
        // create session with any local repo, is redefined anyway below
        RepositorySystemSession rss = new MavenSessionBuilderSupplier(repositorySystem, true)
                .get()