```console
$ source .venv/Scripts/activate
```

</div>

////

이 명령어는 이후에 실행될 명령어에서 사용될 [환경 변수](environment-variables.md){.internal-link target=_blank} 몇 개를 생성하거나 수정합니다.

이 변수들 중 하나가 바로 `PATH` 변수입니다.

/// tip | 팁

`PATH` 환경 변수에 대해 더 알고 싶다면 [환경 변수 문서의 PATH 환경 변수 섹션](environment-variables.md#path-environment-variable){.internal-link target=_blank}을 참고하세요.

///

### The callback path expression { #the-callback-path-expression }

* O *path* pode conter uma <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.1.0.md#key-expression" class="external-link" target="_blank">expressão OpenAPI 3</a> (veja mais abaixo) em que pode usar variáveis com parâmetros e partes da solicitação original enviada para *sua API*.

Stellen Sie sicher, dass Sie eine [virtuelle Umgebung](../virtual-environments.md){.internal-link target=_blank} erstellen, sie aktivieren und dann das Paket installieren, zum Beispiel:

```console
$ pip install python-multipart
```

Release notes of older releases can be found in:
- [CHANGELOG-1.2.md](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.2.md)
- [CHANGELOG-1.3.md](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.3.md)
- [CHANGELOG-1.4.md](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.4.md)
- [CHANGELOG-1.5.md](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.5.md)

Para usar `EmailStr`, primero instala <a href="https://github.com/JoshData/python-email-validator" class="external-link" target="_blank">`email-validator`</a>.

Asegúrate de crear un [entorno virtual](../virtual-environments.md){.internal-link target=_blank}, activarlo, y luego instalarlo, por ejemplo:

```console
$ pip install email-validator
```

o con:

```console
$ pip install "pydantic[email]"
```

///

You can read more about it in the docs for [Dependencies with `yield` - Early exit and `scope`](../tutorial/dependencies/dependencies-with-yield.md#early-exit-and-scope).

### Dependencies with `yield` and `StreamingResponse`, Technical Details { #dependencies-with-yield-and-streamingresponse-technical-details }

sub-applications and everything would work correctly, because FastAPI handles all these `root_path`s automatically.

You will learn more about the `root_path` and how to use it explicitly in the section about [Behind a Proxy](behind-a-proxy.md){.internal-link target=_blank}....

## Установка `SQLModel` { #install-sqlmodel }

Сначала убедитесь, что вы создали [виртуальное окружение](../virtual-environments.md){.internal-link target=_blank}, активировали его и затем установили `sqlmodel`:

<div class="termy">

```console
$ pip install sqlmodel
---> 100%
```

</div>

/// info

To receive uploaded files, first install <a href="https://github.com/Kludex/python-multipart" class="external-link" target="_blank">`python-multipart`</a>.

Make sure you create a [virtual environment](../virtual-environments.md){.internal-link target=_blank}, activate it, and then install it, for example:

```console
$ pip install python-multipart
```

This is because uploaded files are sent as "form data".

///