다음과 같이 실행하면

<div class="termy">

```console
$ python myapp.py
```

</div>

Python에 의해 자동으로 생성된 파일의 내부 변수 `__name__`은 문자열 `"__main__"`을 값으로 갖게 됩니다.

따라서 섹션

```Python
    uvicorn.run(app, host="0.0.0.0", port=8000)
```

이 실행됩니다.

---

해당 모듈(파일)을 가져오면 이런 일이 발생하지 않습니다

그래서 다음과 같은 다른 파일 `importer.py`가 있는 경우:

```Python
from myapp import app

# Some more code
```

* Disable anonymous auth on kubelet ([#41919](https://github.com/kubernetes/kubernetes/pull/41919), [@Cynerva](https://github.com/Cynerva))
* Fix shebangs in charm actions to use python3 ([#42058](https://github.com/kubernetes/kubernetes/pull/42058), [@Cynerva](https://github.com/Cynerva))

        Start-Process -FilePath \"C:\tmp\pyinstall.exe\" -ArgumentList '/quiet InstallAllUsers=1 PrependPath=1 TargetDir=C:\Python312' -Wait; \
	\
	Write-Host 'Verifying install ...'; \
	Write-Host '  python --version'; C:\python312\python.exe --version; \
	\
	Write-Host 'Verifying pip install ...'; \
	C:\python312\python.exe -m pip --version; \
	\
	Write-Host 'Removing ...'; \
	Remove-Item C:\tmp\pyinstall.exe -Force; \
	\

Deklarieren wir also `tags` als Set von Strings.

//// tab | Python 3.10+

```Python hl_lines="12"
{!> ../../docs_src/body_nested_models/tutorial003_py310.py!}
```

////

//// tab | Python 3.9+

```Python hl_lines="14"
{!> ../../docs_src/body_nested_models/tutorial003_py39.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="1  14"
{!> ../../docs_src/body_nested_models/tutorial003.py!}

```

</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")
print(f"Hello {name} from Python")
```

/// tip | "Tipp"

//// tab | Python 3.9+

```Python hl_lines="6  14  22"
{!> ../../docs_src/dependencies/tutorial008_an_py39.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="5  13  21"
{!> ../../docs_src/dependencies/tutorial008_an.py!}
```

////

//// tab | Python 3.8+ nicht annotiert

/// tip | "Tipp"

### Nur modernes Python

Alles basiert auf **Python 3.8 Typ**-Deklarationen (dank Pydantic). Es muss keine neue Syntax gelernt werden, nur standardisiertes modernes Python.

Wenn Sie eine zweiminütige Auffrischung benötigen, wie man Python-Typen verwendet (auch wenn Sie FastAPI nicht benutzen), schauen Sie sich das kurze Tutorial an: [Einführung in Python-Typen](python-types.md){.internal-link target=_blank}.

//// tab | Python 3.9+

```Python hl_lines="17  19-21"
{!> ../../docs_src/settings/app02_an_py39/main.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="17  19-21"
{!> ../../docs_src/settings/app02_an/main.py!}
```

////

//// tab | Python 3.8+ non-Annotated

/// tip

//// tab | Python 3.9+

```Python hl_lines="15-16"
{!> ../../docs_src/dependencies/tutorial008c_an_py39.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="14-15"
{!> ../../docs_src/dependencies/tutorial008c_an.py!}
```

////

//// tab | Python 3.8+ non-Annotated

/// tip

For example, we can define an `Image` model:

//// tab | Python 3.10+

```Python hl_lines="7-9"
{!> ../../docs_src/body_nested_models/tutorial004_py310.py!}
```

////

//// tab | Python 3.9+

```Python hl_lines="9-11"
{!> ../../docs_src/body_nested_models/tutorial004_py39.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="9-11"