Por ejemplo, cuando escribes `python` en la terminal, el sistema operativo busca un programa llamado `python` en el **primer directorio** de esa lista.

Si lo encuentra, entonces lo **utilizará**. De lo contrario, continúa buscando en los **otros directorios**.

### Instalando Python y Actualizando el `PATH`

<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`.

**FastAPI** llama a la clase `CommonQueryParams`. Esto crea una "instance" de esa clase y la instance será pasada como el parámetro `commons` a tu función.

## Anotación de tipos vs `Depends`

Nota cómo escribimos `CommonQueryParams` dos veces en el código anterior:

//// tab | Python 3.8+

```Python
commons: Annotated[CommonQueryParams, Depends(CommonQueryParams)]
```

////

  val platform = PlatformRule()

  @RegisterExtension
  val clientTestRule = OkHttpClientTestRule()

  private val dns = FakeDns()
  private val proxySelector = RecordingProxySelector()
  private val uriHost = "hosta"
  private val uriPort = 1003
  private val factory =
    TestValueFactory().apply {
      this.dns = ******@****.***
      this.proxySelector = ******@****.***elector

    @CsvSource({ "3, 51, Windows NT 3.51", "4, 0, Windows NT 4.0", "5, 0, Windows 2000", "5, 1, Windows XP", "5, 2, Windows Server 2003",
            "6, 0, Windows Vista", "6, 1, Windows 7", "6, 2, Windows 8", "6, 3, Windows 8.1", "10, 0, Windows 10" })
    void testReadDataWireFormatWithVariousVersions(int major, int minor, String description) throws Exception {
        setConverter(response, 0);

    end

    rect rgba(0, 255, 255, .1)
        code ->> function: say_hi(name="Camila")
        function ->> code: retornar resultado armazenado
    end
```

No caso da nossa dependência `get_settings()`, a função não recebe nenhum argumento, então ela sempre retorna o mesmo valor.

```console
$ echo "*" > .venv/.gitignore
```

</div>

/// details | O que esse comando significa

* `echo "*"`: irá "imprimir" o texto `*` no terminal (a próxima parte muda isso um pouco)
* `>`: qualquer coisa impressa no terminal pelo comando à esquerda de `>` não deve ser impressa, mas sim escrita no arquivo que vai à direita de `>`
* `.gitignore`: o nome do arquivo onde o texto deve ser escrito

that for two reasons.  First, because I'm on the same side of the
door as you are; secondly, because they're making such a noise
inside, no one could possibly hear you.'  And certainly there was
a most extraordinary noise going on within--a constant howling
and sneezing, and every now and then a great crash, as if a dish
or kettle had been broken to pieces.

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Giuseppe, Glenn Weidner, gracehoney, Guozhong Zhuang, Haichen "Hc" Li, Harald
Husum, harumitsu.nobuta, Henry Spivey, hsm207, Jekyll Song, Jerome, Jiongyan
Zhang, jjsjann123, John Sungjin Park, Johnson145, JoshVarty, Julian Wolff, Jun
Wang, June-One, Kamil Sindi, Kb Sriram, Kdavis-Mozilla, Kenji, lazypanda1,

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