* Fix typos and update wording in deployment docs. PR [#700](https://github.com/tiangolo/fastapi/pull/700) by [@marier-nico](https://github.com/tiangolo/fastapi/pull/700).
* Add note about dependencies in `APIRouter` docs. PR [#698](https://github.com/tiangolo/fastapi/pull/698) by [@marier-nico](https://github.com/marier-nico).

Dies ist lediglich eine **schnelle Anleitung / Auffrischung** über Pythons Typhinweise. Sie deckt nur das Minimum ab, das nötig ist, um diese mit **FastAPI** zu verwenden ... was tatsächlich sehr wenig ist.

**FastAPI** basiert vollständig auf diesen Typhinweisen, sie geben der Anwendung viele Vorteile und Möglichkeiten.

Aber selbst wenn Sie **FastAPI** nie verwenden, wird es für Sie nützlich sein, ein wenig darüber zu lernen.

/// note | Hinweis

In diesem Abschnitt werden wir sehen, wie man andere Middlewares verwendet.

## ASGI-Middleware hinzufügen { #adding-asgi-middlewares }

Da **FastAPI** auf Starlette basiert und die <abbr title="Asynchrones Server-Gateway-Interface">ASGI</abbr>-Spezifikation implementiert, können Sie jede ASGI-Middleware verwenden.

    if (seenExceptionsLocal == null) {
      // TODO(cpovirk): Should we use a simpler (presumably cheaper) data structure?
      /*
       * Using weak references here could let us release exceptions earlier, but:
       *
       * 1. On Android, querying a WeakReference blocks if the GC is doing an otherwise-concurrent
       * pass.
       *

Import the `Response` class (sub-class) you want to use and declare it in the *path operation decorator*.

For large responses, returning a `Response` directly is much faster than returning a dictionary.

things you should know about contributing:

1.  API changes require discussion, use cases, etc. Code comes later.
2.  Pull requests are great for small fixes for bugs, documentation, etc.
3.  Pull requests are not merged directly into the master branch.
4.  Code contributions require signing a Google CLA.

API changes
-----------

We make changes to Guava's public [APIs][], including adding new APIs, very

Der `TestClient` basiert auf <a href="https://www.python-httpx.org" class="external-link" target="_blank">HTTPX</a> und glücklicherweise können wir es direkt verwenden, um die API zu testen.

## Beispiel { #example }

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;
import java.util.concurrent.atomic.AtomicInteger;
import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;

/**
 * Basher test for {@link ConcurrentHashMultiset}: start a bunch of threads, have each of them do
 * operations at random. Each thread keeps track of the per-key deltas that it's directly

/**
 * Holds a model along with some auxiliary information. This internal utility class assists the model builder during POM
 * processing by providing a means to transport information that cannot be (easily) extracted from the model itself.
 *
 * @deprecated use {@code org.apache.maven.api.services.ModelBuilder} instead
 */
@Deprecated(since = "4.0.0")
class ModelData {
    private final ModelSource source;

    }

    /**
     * We use this to map all phases to the lifecycle that contains it. This is used so that a user can specify the
     * phase they want to execute, and we can easily determine what lifecycle we need to run.
     *
     * @return A map of lifecycles, indexed on id
     */
    public Map<String, Lifecycle> getPhaseToLifecycleMap() {