<a href="https://github.com/containous/traefik/releases" class="external-link" target="_blank">Faça o download do Traefik.</a>, Ele é um único binário e você pode extrair o arquivo compactado e executá-lo diretamente do terminal.

Então, crie um arquivo `traefik.toml` com:

```TOML hl_lines="3"
[entryPoints]
  [entryPoints.http]
    address = ":9999"

[providers]
  [providers.file]
    filename = "routes.toml"

labels.mobile=Mobile
labels.user_postalAddress=Postal Address
labels.postalAddress=Postal Address
labels.user_city=City
labels.city=City
labels.user_teletexTerminalIdentifier=Teletex Terminal Identifier
labels.teletexTerminalIdentifier=Teletex Terminal Identifier
labels.user_x121Address=x121Address
labels.x121Address=x121Address
labels.user_businessCategory=Business Category
labels.businessCategory=Business Category

labels.mobile=Mobiltelefon
labels.user_postalAddress=Postanschrift
labels.postalAddress=Postanschrift
labels.user_city=Stadt
labels.city=Stadt
labels.user_teletexTerminalIdentifier=Teletex-Terminal-Kennung
labels.teletexTerminalIdentifier=Teletex-Terminal-Kennung
labels.user_x121Address=x121Address
labels.x121Address=x121Address
labels.user_businessCategory=Geschäftskategorie
labels.businessCategory=Geschäftskategorie

    call: Call,
    inetSocketAddress: InetSocketAddress,
    proxy: Proxy,
    protocol: Protocol?,
  ) {
  }

  /**
   * Invoked when a connection attempt fails. This failure is not terminal if further routes are
   * available and failure recovery is enabled.
   *
   * If the `call` uses HTTPS, this will be invoked after [secureConnectStart], otherwise it will
   * invoked after [connectStart].
   */

      // to a confusing error message.
      throw new TimeoutException(
          "Timed out waiting for "
              + this
              + " to reach a terminal state. "
              + "Current state: "
              + state());
    }
  }

  /** Checks that the current state is equal to the expected state. */
  @GuardedBy("monitor")

$ echo "Hello $Env:MY_NAME"

Hello Wade Wilson
```

</div>

////

### Umgebungsvariablen mit Python auslesen

Sie können Umgebungsvariablen auch außerhalb von Python im Terminal (oder mit einer anderen Methode) erstellen und diese dann mit Python auslesen.

Sie könnten zum Beispiel eine Datei `main.py` haben mit:

```Python hl_lines="3"
import os

name = os.getenv("MY_NAME", "World")

labels.user_postalAddress=Endereço postal
labels.postalAddress=Endereço postal
labels.user_city=Cidade
labels.city=Cidade
labels.user_teletexTerminalIdentifier=Identificador de terminal de teletex
labels.teletexTerminalIdentifier=Identificador de terminal de teletex
labels.user_x121Address=x121Address
labels.x121Address=x121Address
labels.user_businessCategory=Categoria de negócios
labels.businessCategory=Categoria de negócios

labels.mobile=Mobile
labels.user_postalAddress=Adresse postale
labels.postalAddress=Adresse postale
labels.user_city=Ville
labels.city=Ville
labels.user_teletexTerminalIdentifier=Identifiant de terminal Teletex
labels.teletexTerminalIdentifier=Identifiant de terminal Teletex
labels.user_x121Address=x121Address
labels.x121Address=x121Address
labels.user_businessCategory=Catégorie d'entreprise
labels.businessCategory=Catégorie d'entreprise

	// but advance only one byte. This matches the behavior of a range loop over
	// an incorrectly encoded string.
	return 1, errorRune, nil
}

// dropCR drops a terminal \r from the data.
func dropCR(data []byte) []byte {
	if len(data) > 0 && data[len(data)-1] == '\r' {
		return data[0 : len(data)-1]
	}
	return data
}

Si estás construyendo una aplicación de <abbr title="Interfaz de Línea de Comandos">CLI</abbr> para ser usada en el terminal en lugar de una API web, revisa <a href="https://typer.tiangolo.com/" class="external-link" target="_blank">**Typer**</a>.

**Typer** es el hermano pequeño de FastAPI. Y está destinado a ser el **FastAPI de las CLIs**. ⌨️ 🚀