この `entrypoint` により、`fastapi` コマンドは次のようにアプリを import する必要があると認識します:

```python
from main import app
```

もしコード構成が次のような場合:

```
.
├── backend
│   ├── main.py
│   ├── __init__.py
```

`entrypoint` は次のように設定します:

```toml
[tool.fastapi]
entrypoint = "backend.main:app"
```

これは次と同等です:

```python
from backend.main import app
```

### パス指定での `fastapi dev` { #fastapi-dev-with-path }

@pytest.mark.filterwarnings(
    r"ignore:\s*on_event is deprecated, use lifespan event handlers instead.*:DeprecationWarning"
)
def test_router_events(state: State) -> None:
    app = FastAPI()

    @app.get("/")
    def main() -> dict[str, str]:
        return {"message": "Hello World"}

    @app.on_event("startup")
    def app_startup() -> None:
        state.app_startup = True

    @app.on_event("shutdown")

Digamos que você tenha uma estrutura de arquivo conforme descrito em [Aplicações maiores](bigger-applications.md):

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

No arquivo `main.py` você tem sua aplicação **FastAPI**:


{* ../../docs_src/app_testing/app_a_py310/main.py *}

### Arquivo de teste { #testing-file }

  <suppress files="modules[/\\]lang-painless[/\\]src[/\\]main[/\\]java[/\\]org[/\\]elasticsearch[/\\]painless[/\\]antlr[/\\]PainlessLexer\.java" checks="." />
  <suppress files="modules[/\\]lang-painless[/\\]src[/\\]main[/\\]java[/\\]org[/\\]elasticsearch[/\\]painless[/\\]antlr[/\\]PainlessParser(|BaseVisitor|Visitor)\.java" checks="." />

  toolVersion = version("checkstyle")

  val sourceSets = project.extensions.findByType<SourceSetContainer>()
  val main = sourceSets?.findByName("main") ?: sourceSets?.findByName("jvmMain")
  if (main != null) {
    this.sourceSets = listOf(main)
  }
}

val androidSignature = configurations.maybeCreate("androidSignature")
val jvmSignature = configurations.maybeCreate("jvmSignature")

    <sourceDirectory>${project.basedir}/src/main/java</sourceDirectory>
    <scriptSourceDirectory>${project.basedir}/src/main/scripts</scriptSourceDirectory>
    <testSourceDirectory>${project.basedir}/src/test/java</testSourceDirectory>
    <resources>
      <resource>
        <directory>${project.basedir}/src/main/resources</directory>
      </resource>
      <resource>

        #  you should specify the map of included schemas.
        #  Additional schemas have original settings apart from the main schema.
        #  The settings are objectTypeTargetList, tableExceptList,
        #  tableTargetList, and columnExceptMap.
        #  They have the same specification as ones of the main schema.
        #  Elements of this map are as below: 
        #    o objectTypeTargetList: (NotRequired - Default 'map:{TABLE;VIEW}')

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

Файл `main.py` міститиме:

{* ../../docs_src/async_tests/app_a_py310/main.py *}

Файл `test_main.py` міститиме тести для `main.py`, тепер це може виглядати так:

{* ../../docs_src/async_tests/app_a_py310/test_main.py *}

## Запуск { #run-it }

```python
from main import app
```

Wenn Ihr Code so strukturiert wäre:

```
.
├── backend
│   ├── main.py
│   ├── __init__.py
```

Dann würden Sie den `entrypoint` wie folgt setzen:

```toml
[tool.fastapi]
entrypoint = "backend.main:app"
```

was gleichbedeutend wäre mit:

```python
from backend.main import app
```

```python
from main import app
```

If your code was structured like:

```
.
├── backend
│   ├── main.py
│   ├── __init__.py
```

Then you would set the `entrypoint` as:

```toml
[tool.fastapi]
entrypoint = "backend.main:app"
```

which would be equivalent to:

```python
from backend.main import app
```