## pytest.mark.anyio

If we want to call asynchronous functions in our tests, our test functions have to be asynchronous. AnyIO provides a neat plugin for this, that allows us to specify that some test functions are to be called asynchronously.

## HTTPX

Even if your **FastAPI** application uses normal `def` functions instead of `async def`, it is still an `async` application underneath.

 * {@link #callAndAssertBlocks} method is ever called in a test, the lock-like object must have a
 * method equivalent to {@link java.util.concurrent.locks.ReentrantLock#hasQueuedThread(Thread)}. If
 * the {@link #callAndAssertWaits} method is ever called in a test, the lock-like object must have a
 * method equivalent to {@link

### Async Context Manager

If you check, the function is decorated with an `@asynccontextmanager`.

That converts the function into something called an "**async context manager**".

{* ../../docs_src/events/tutorial003.py hl[1,13] *}

A **context manager** in Python is something that you can use in a `with` statement, for example, `open()` can be used as a context manager:

Interceptors can be chained. Suppose you have both a compressing interceptor and a checksumming interceptor: you'll need to decide whether data is compressed and then checksummed, or checksummed and then compressed. OkHttp uses lists to track interceptors, and interceptors are called in order.

Wie bereits oben erwähnt, können Sie `./scripts/docs.py` mit dem Befehl `live` verwenden, um eine Vorschau der Ergebnisse anzuzeigen (oder `mkdocs serve`).

Sobald Sie fertig sind, können Sie auch alles so testen, wie es online aussehen würde, einschließlich aller anderen Sprachen.

Bauen Sie dazu zunächst die gesamte Dokumentation:

<div class="termy">

```console
// Verwenden Sie das Kommando „build-all“, das wird ein wenig dauern

mouth and yawned once or twice, and shook itself.  Then it got
down off the mushroom, and crawled away in the grass, merely
remarking as it went, `One side will make you grow taller, and
the other side will make you grow shorter.'

  `One side of WHAT?  The other side of WHAT?' thought Alice to
herself.

  `Of the mushroom,' said the Caterpillar, just as if she had

    }
    return doHash(t);
  }

  /**
   * Implemented by the user to return a hash code for {@code t}, subject to the requirements
   * specified in {@link #hash}.
   *
   * <p>This method should not be called except by {@link #hash}. When {@link #hash} calls this
   * method, {@code t} is guaranteed to be non-null.
   *
   * @since 10.0 (previously, subclasses would override hash())
   */
  @ForOverride

        values every time they are called (for a given variable shape). For
        unseeded initializers (`seed=None`), a random seed will be created and
        assigned at initializer creation (different initializer instances get
        different seeds).
    *   An unseeded initializer will raise a warning if it is reused (called)
        multiple times. This is because it would produce the same values each

Manchmal benötigen Sie den Rückgabewert einer Abhängigkeit innerhalb Ihrer *Pfadoperation-Funktion* nicht wirklich.

Oder die Abhängigkeit gibt keinen Wert zurück.

Aber Sie müssen Sie trotzdem ausführen/auflösen.

In diesen Fällen können Sie, anstatt einen Parameter der *Pfadoperation-Funktion* mit `Depends` zu deklarieren, eine `list`e von `dependencies` zum *Pfadoperation-Dekorator* hinzufügen.

## `dependencies` zum *Pfadoperation-Dekorator* hinzufügen

Und die Unteranwendung könnte auch ihre eigenen gemounteten Unteranwendungen haben und alles würde korrekt funktionieren, da FastAPI sich um alle diese `root_path`s automatisch kümmert.