Bevorzugen Sie die `Annotated`-Version, falls möglich.

///

```Python hl_lines="7"
{!> ../../docs_src/dependencies/tutorial011.py!}
```

////

In diesem Fall wird **FastAPI** `__init__` nie berühren oder sich darum kümmern, wir werden es direkt in unserem Code verwenden.

## Eine Instanz erstellen

Wir könnten eine Instanz dieser Klasse erstellen mit:

//// tab | Python 3.9+

```Python hl_lines="18"

    * Ein Beispiel ist `404`, für eine „Not Found“-Response („Nicht gefunden“).
    * Für allgemeine Fehler beim Client können Sie einfach `400` verwenden.
* `500` und darüber stehen für Server-Fehler. Diese verwenden Sie fast nie direkt. Wenn etwas an irgendeiner Stelle in Ihrem Anwendungscode oder im Server schiefläuft, wird automatisch einer dieser Fehler-Statuscodes zurückgegeben.

/// tip | "Tipp"

We might want to separate between installation and activation, it might be nice to allow a user to activate/deactivate a plugin instead of having to uninstall and reinstall a plugin in particular cases. This would prevent having to reconfigure the plugin again. For example it might be nice to turn off LDAP authentication without having to uninstall the plugin.

listen to her, still it was good practice to say it over) `--yes,
that's about the right distance--but then I wonder what Latitude
or Longitude I've got to?'  (Alice had no idea what Latitude was,
or Longitude either, but thought they were nice grand words to
say.)

  Presently she began again.  `I wonder if I shall fall right
THROUGH the earth!  How funny it'll seem to come out among the
people that walk with their heads downward!  The Antipathies, I

       * need to clear our reference to the TimeoutFuture is the reason we use a *static* nested
       * class with a manual reference back to the "containing" class.)
       *
       * This has the nice-ish side effect of limiting reentrancy: run() calls
       * timeoutFuture.setException() calls run(). That reentrancy would already be harmless, since

Pacific/Funafuti Pacific/Galapagos Pacific/Gambier Pacific/Guadalcanal Pacific/Guam Pacific/Honolulu Pacific/Johnston Pacific/Kanton Pacific/Kiritimati Pacific/Kosrae Pacific/Kwajalein Pacific/Majuro Pacific/Marquesas Pacific/Midway Pacific/Nauru Pacific/Niue Pacific/Norfolk Pacific/Noumea Pacific/Pago_Pago Pacific/Palau Pacific/Pitcairn Pacific/Pohnpei Pacific/Ponape Pacific/Port_Moresby Pacific/Rarotonga Pacific/Saipan Pacific/Samoa Pacific/Tahiti Pacific/Tarawa Pacific/Tongatapu Pacific/Truk Pacific/Wake...

/*

- test projects for each of these
- how to categorize the problems so that the id of the problem can be match to a page with descriptive help and the test
  project
- nice little sample projects that could be run in the core as well as integration tests

All Possible Errors
- invalid lifecycle phase (maybe same as bad CLI param, though you were talking about embedder too)

---

"_Ní tòótọ́, ohun tí o kọ dára ó sì tún dán. Ní ọ̀pọ̀lọpọ̀ ọ̀nà, ohun tí mo fẹ́ kí **Hug** jẹ́ nìyẹn - ó wúni lórí gan-an láti rí ẹnìkan tí ó kọ́ nǹkan bí èyí._"

With just that Python type declaration, **FastAPI** will:

* Read the body of the request as JSON.
* Convert the corresponding types (if needed).
* Validate the data.
    * If the data is invalid, it will return a nice and clear error, indicating exactly where and what was the incorrect data.
* Give you the received data in the parameter `item`.

          }
          else -> throw AssertionError("unsupported hashAlgorithm: ${pin.hashAlgorithm}")
        }
      }
    }

    // If we couldn't find a matching pin, format a nice exception.
    val message =
      buildString {
        append("Certificate pinning failure!")
        append("\n  Peer certificate chain:")
        for (element in peerCertificates) {
          append("\n    ")