```
.
├── app
│   ├── __init__.py
│   └── main.py
```

No arquivo `main.py` você tem seu aplicativo **FastAPI**:


{* ../../docs_src/app_testing/main.py *}

### Arquivo de teste

		<fileSet>
			<filtered>true</filtered>
			<directory>src/main/assemblies/files</directory>
			<outputDirectory>fess-${project.version}/bin</outputDirectory>
			<lineEnding>dos</lineEnding>
			<includes>
				<include>fess.in.bat</include>
				<include>fess.bat</include>
				<include>service.bat</include>
			</includes>
		</fileSet>
		<fileSet>
			<directory>src/main/assemblies/extension</directory>

Solr has become a top-level Apache project and main line 
development for Lucene and Solr is happening in each 
project's git repository now:

- Lucene: <https://gitbox.apache.org/repos/asf/lucene.git>
- Solr: <https://gitbox.apache.org/repos/asf/solr.git>

If you're seeing this message then switch the development to 'main':
git checkout main

Development for branch 8x remains in the shared repository:

# More Python versions: Deadsnakes
deb http://ppa.launchpad.net/deadsnakes/ppa/ubuntu focal main
deb-src http://ppa.launchpad.net/deadsnakes/ppa/ubuntu focal main

# LLVM/Clang 18 repository
deb http://apt.llvm.org/focal/ llvm-toolchain-focal-18 main
deb-src http://apt.llvm.org/focal/ llvm-toolchain-focal-18 main

Para ejecutar cualquiera de los ejemplos, copia el código a un archivo `main.py`, y comienza `fastapi dev` con:

<div class="termy">

```console
$ <font color="#4E9A06">fastapi</font> dev <u style="text-decoration-style:single">main.py</u>
<font color="#3465A4">INFO    </font> Using path <font color="#3465A4">main.py</font>

```

</div>

/// note | Nota

O comando `uvicorn main:app` refere-se a:

* `main`: o arquivo `main.py` (o "módulo" Python).
* `app`: o objeto criado dentro de `main.py` com a linha `app = FastAPI()`.

É equivalente a:

```Python
from main import app
```

///

<div class="termy">

```console
// اینجا هنوز متغیر محیطی رو تنظیم نکردیم
$ python main.py

// چون متغیر محیطی رو تنظیم نکردیم، مقدار پیش‌فرض رو می‌گیریم

Hello World from Python

// ولی اگه اول یه متغیر محیطی بسازیم
$ export MY_NAME="Wade Wilson"

// و بعد دوباره برنامه رو صدا کنیم
$ python main.py

// حالا می‌تونه متغیر محیطی رو بخونه

Hello Wade Wilson from Python
```

</div>

```console
// Erstelle eine Umgebungsvariable MY_NAME inline für diesen Programmaufruf
$ MY_NAME="Wade Wilson" python main.py

// main.py kann jetzt diese Umgebungsvariable lesen

Hello Wade Wilson from Python

// Die Umgebungsvariable existiert danach nicht mehr
$ python main.py

Hello World from Python
```

</div>

/// tip | Tipp

```Python hl_lines="1  3  7" title="app/main.py"
{!../../docs_src/bigger_applications/app/main.py!}
```

### Импорт `APIRouter`

Теперь мы импортируем другие суб-модули, содержащие `APIRouter`:

```Python hl_lines="4-5" title="app/main.py"
{!../../docs_src/bigger_applications/app/main.py!}
```

```
.
├── app
│   ├── __init__.py
│   └── main.py
```

`main.py` 파일 안에 **FastAPI** app 을 만들었습니다:

{* ../../docs_src/app_testing/main.py *}

### 테스트 파일

테스트를 위해 `test_main.py` 라는 파일을 생성할 수 있습니다. 이 파일은 동일한 Python 패키지(즉, `__init__.py` 파일이 있는 동일한 디렉터리)에 위치할 수 있습니다.

``` hl_lines="5"
.
├── app
│   ├── __init__.py
│   ├── main.py
│   └── test_main.py
```