<span style="background-color:#009485"><font color="#D3D7CF"> FastAPI </font></span>  Starting production server 🚀

             Searching for package file structure from directories with
             <font color="#3465A4">__init__.py</font> files
             Importing from <font color="#75507B">/home/user/code/</font><font color="#AD7FA8">awesomeapp</font>

   <span style="background-color:#007166"><font color="#D3D7CF"> module </font></span>  🐍 main.py

  <span style="background-color:#009485"><font color="#D3D7CF"> FastAPI </font></span>  Starting development server 🚀

             Searching for package file structure from directories
             with <font color="#3465A4">__init__.py</font> files
             Importing from <font color="#75507B">/home/user/code/</font><font color="#AD7FA8">awesomeapp</font>

   <span style="background-color:#007166"><font color="#D3D7CF"> module </font></span>  🐍 main.py

  <span style="background-color:#009485"><font color="#D3D7CF"> FastAPI </font></span>  Starting development server 🚀

             Searching for package file structure from directories
             with <font color="#3465A4">__init__.py</font> files
             Importing from <font color="#75507B">/home/user/code/</font><font color="#AD7FA8">awesomeapp</font>

   <span style="background-color:#007166"><font color="#D3D7CF"> module </font></span>  🐍 main.py

There are other formats and tools to define and install package dependencies.

///

### Create the **FastAPI** Code { #create-the-fastapi-code }

* Create an `app` directory and enter it.
* Create an empty file `__init__.py`.
* Create a `main.py` file with:

```Python
from typing import Union

from fastapi import FastAPI

app = FastAPI()


@app.get("/")
def read_root():

///

### Crie o código do **FastAPI** { #create-the-fastapi-code }

* Crie um diretório `app` e entre nele.
* Crie um arquivo vazio `__init__.py`.
* Crie um arquivo `main.py` com:

```Python
from typing import Union

from fastapi import FastAPI

app = FastAPI()


@app.get("/")
def read_root():

E então usá-lo em um arquivo `main.py`:

{* ../../docs_src/settings/app01_py39/main.py hl[3,11:13] *}

/// tip | Dica

Você também precisaria de um arquivo `__init__.py` como visto em [Aplicações Maiores - Múltiplos Arquivos](../tutorial/bigger-applications.md){.internal-link target=_blank}.

///

## Configurações em uma dependência { #settings-in-a-dependency }

                # TODO: probably make status_code a default class attribute for all
                # responses in Starlette
                response_signature = inspect.signature(current_response_class.__init__)
                status_code_param = response_signature.parameters.get("status_code")
                if status_code_param is not None:
                    if isinstance(status_code_param.default, int):

例如，您可以创建一个名为 `config.py` 的文件，其中包含以下内容：

{* ../../docs_src/settings/app01/config.py *}

然后在一个名为 `main.py` 的文件中使用它：

{* ../../docs_src/settings/app01/main.py hl[3,11:13] *}

/// tip

您还需要一个名为 `__init__.py` 的文件，就像您在[Bigger Applications - Multiple Files](../tutorial/bigger-applications.md){.internal-link target=_blank}中看到的那样。

///

## 在依赖项中使用设置

在某些情况下，从依赖项中提供设置可能比在所有地方都使用全局对象 `settings` 更有用。

        assert dependant.call is not None, "dependant.call must be a function"
        await dependant.call(**solved_result.values)

    return app


class APIWebSocketRoute(routing.WebSocketRoute):
    def __init__(
        self,
        path: str,
        endpoint: Callable[..., Any],
        *,
        name: Optional[str] = None,
        dependencies: Optional[Sequence[params.Depends]] = None,

  <span style="background-color:#009485"><font color="#D3D7CF"> FastAPI </font></span>  Starting development server 🚀

             Searching for package file structure from directories
             with <font color="#3465A4">__init__.py</font> files
             Importing from <font color="#75507B">/home/user/code/</font><font color="#AD7FA8">awesomeapp</font>

   <span style="background-color:#007166"><font color="#D3D7CF"> module </font></span>  🐍 main.py