when you have to turn into a chrysalis--you will some day, you
know--and then after that into a butterfly, I should think you'll
feel it a little queer, won't you?'

  `Not a bit,' said the Caterpillar.

  `Well, perhaps your feelings may be different,' said Alice;
`all I know is, it would feel very queer to ME.'

  `You!' said the Caterpillar contemptuously.  `Who are YOU?'

{* ../../docs_src/dependencies/tutorial001_an_py310.py hl[9] *}

Aber dann haben wir ein `dict` im Parameter `commons` der *Pfadoperation-Funktion*.

Und wir wissen, dass Editoren nicht viel Unterstützung (wie etwa Code-Vervollständigung) für `dict`s bieten können, weil sie ihre Schlüssel- und Werttypen nicht kennen.

Das können wir besser machen ...

## Was macht eine Abhängigkeit aus

Temporarily adopting this point of view (of the *external developer*) can help you feel like it's more obvious where to put the parameters, the Pydantic model for the body, for the response, etc. for that *external API*.

///

### Create a callback `APIRouter` { #create-a-callback-apirouter }

Vous pouvez comparer ce paramètre avec les membres de votre énumération `ModelName` :

{* ../../docs_src/path_params/tutorial005.py hl[17] *}

#### Récupérer la *valeur de l'énumération*

Vous pouvez obtenir la valeur réel d'un membre (une chaîne de caractères ici), avec `model_name.value`, ou en général, `votre_membre_d'enum.value` :

{* ../../docs_src/path_params/tutorial005.py hl[20] *}

/// tip | Astuce

Ich habe immer gesagt, dass ich Geschichte nicht so sehr mag ... und jetzt schauen Sie mich an, wie ich „Technikgeschichte“-Unterricht gebe. 😅

Um mehr über <a href="https://pydantic-docs.helpmanual.io/" class="external-link" target="_blank">Pydantic zu erfahren, schauen Sie sich dessen Dokumentation an</a>.

///

**FastAPI** basiert vollständig auf Pydantic.

Viel mehr von all dem werden Sie in praktischer Anwendung im [Tutorial - Benutzerhandbuch](tutorial/index.md){.internal-link target=_blank} sehen.

/// tip | Tipp

* Coverage should stay at 100%.
* If you see the PR makes sense, or we discussed it and considered it should be accepted, you can add commits on top of the PR to tweak it, to add docs, tests, format, refactor, remove extra files, etc.
* Feel free to comment in the PR to ask for more information, to suggest changes, etc.
* Once you think the PR is ready, move it in the internal GitHub project for me to review it.

## FastAPI People PRs

///

/// warning

These are very technical details about the standards **JSON Schema** and **OpenAPI**.

If the ideas above already work for you, that might be enough, and you probably don't need these details, feel free to skip them.

///

Before OpenAPI 3.1.0, OpenAPI used an older and modified version of **JSON Schema**.

JSON Schema didn't have `examples`, so OpenAPI added its own `example` field to its own modified version.

This is because FastAPI uses this `root_path` to create the default `server` in OpenAPI with the URL provided by `root_path`.

## Additional servers { #additional-servers }

/// warning

This is a more advanced use case. Feel free to skip it.

///

By default, **FastAPI** will create a `server` in the OpenAPI schema with the URL for the `root_path`.

	VLEIF	$2, $-43, V16           // e700ffd52843
	VLEIG	$1, $32767, V31         // e7f07fff1842
	VSLDB	$3, V1, V16, V18        // e72100030a77
	VERIMB	$2, V31, V1, V2         // e72f10020472
	VSEL	V1, V2, V3, V4          // e7412000308d
	VGFMAH	V21, V31, V24, V0       // e705f10087bc
	VFMADB	V16, V8, V9, V10        // e7a08300948f
	WFMADB	V17, V18, V19, V20      // e74123083f8f