### Just Modern Python { #just-modern-python }

It's all based on standard **Python type** declarations (thanks to Pydantic). No new syntax to learn. Just standard modern Python.

If you need a 2 minute refresher of how to use Python types (even if you don't use FastAPI), check the short tutorial: [Python Types](python-types.md){.internal-link target=_blank}.

You write standard Python with types:

```Python
from datetime import date

���MetaSys��x-minio-internal-replica-status�REPLICA�"x-minio-internal-replica-timestamp�2022-03-20T15:17:01.730949636Z�MetaUsr��X-Amz-Replication-Status�REPLICA�etag� 9587ddd31fead633830366f45d221d56�content-type�application/octet-stream�x-amz-storage-class�STANDARD�$��PPb�I(��e��(������������
�
Ղ�Type
�V2Obj��ID�PPb�I(��e��(�ǤDDir�+O~A߂J^�����3/�EcAlgo
�EcM�EcN�EcBSize��EcIndex
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�PartETags��PartSizes��	ը�PartASizes��	ը�Size�	ը�MTime�����çMetaSys�...

## Dependencies { #dependencies }

FastAPI depends on Pydantic and Starlette.

### `standard` Dependencies { #standard-dependencies }

When you install FastAPI with `pip install "fastapi[standard]"` it comes with the `standard` group of optional dependencies:

Used by Pydantic:

Tout est basé sur la déclaration de type standard de **Python 3.8** (grâce à Pydantic). Pas de nouvelles syntaxes à apprendre. Juste du Python standard et moderne.

Si vous souhaitez un rappel de 2 minutes sur l'utilisation des types en Python (même si vous ne comptez pas utiliser FastAPI), jetez un oeil au tutoriel suivant: [Python Types](python-types.md){.internal-link target=_blank}.

Vous écrivez du python standard avec des annotations de types:

```Python

Notice that the path parameter is declared to be an integer.

///

## Standards-based benefits, alternative documentation { #standards-based-benefits-alternative-documentation }

And because the generated schema is from the <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.1.0.md" class="external-link" target="_blank">OpenAPI</a> standard, there are many compatible tools.

Es war beispielsweise klar, dass es idealerweise auf Standard-Python-Typhinweisen basieren sollte.

Der beste Ansatz bestand außerdem darin, bereits bestehende Standards zu nutzen.

Por ejemplo, para instalar Uvicorn:

<div class="termy">

```console
$ pip install "uvicorn[standard]"

---> 100%
```

</div>

Un proceso similar se aplicaría a cualquier otro programa de servidor ASGI.

/// tip | Consejo

Al añadir `standard`, Uvicorn instalará y usará algunas dependencias adicionales recomendadas.

* `fastapi-cli` - para proporcionar el comando `fastapi`.

### Sin Dependencias `standard`

Si no deseas incluir las dependencias opcionales `standard`, puedes instalar con `pip install fastapi` en lugar de `pip install "fastapi[standard]"`.

### Dependencias Opcionales Adicionales

For example, it was clear that ideally it should be based on standard Python type hints.

Also, the best approach was to use already existing standards.

So, before even starting to code **FastAPI**, I spent several months studying the specs for OpenAPI, JSON Schema, OAuth2, etc. Understanding their relationship, overlap, and differences.

<div class="termy">

```console
$ pip install "fastapi[standard]"

---> 100%
```

</div>

/// note | Nota

Cuando instalas con `pip install "fastapi[standard]"` viene con algunas dependencias opcionales estándar por defecto.

Si no quieres tener esas dependencias opcionales, en su lugar puedes instalar `pip install fastapi`.

///