🖼 👆 💪 ✔️ 📁 `main.py` ⏮️:

```Python hl_lines="3"
import os

name = os.getenv("MY_NAME", "World")
print(f"Hello {name} from Python")
```

!!! tip
    🥈 ❌ <a href="https://docs.python.org/3.8/library/os.html#os.getenv" class="external-link" target="_blank">`os.getenv()`</a> 🔢 💲 📨.

    🚥 🚫 🚚, ⚫️ `None` 🔢, 📥 👥 🚚 `"World"` 🔢 💲 ⚙️.

⤴️ 👆 💪 🤙 👈 🐍 📋:

<div class="termy">

```console

!!! note "技術詳細"
    以下と一緒に使用できる関数なら何でも有効です:

    * <a href="https://docs.python.org/3/library/contextlib.html#contextlib.contextmanager" class="external-link" target="_blank">`@contextlib.contextmanager`</a>または
    * <a href="https://docs.python.org/3/library/contextlib.html#contextlib.asynccontextmanager" class="external-link" target="_blank">`@contextlib.asynccontextmanager`</a>

    これらは **FastAPI** の依存関係として使用するのに有効です。

* You can get metadata from the uploaded file.
* It has a <a href="https://docs.python.org/3/glossary.html#term-file-like-object" class="external-link" target="_blank">file-like</a> `async` interface.

## Technische Details

Nur ein technisches Detail für die neugierigen Nerds. 🤓

In der technischen ASGI-Spezifikation ist dies Teil des <a href="https://asgi.readthedocs.io/en/latest/specs/lifespan.html" class="external-link" target="_blank">Lifespan Protokolls</a> und definiert Events namens `startup` und `shutdown`.

!!! info

## Detalhes técnicos

Só um detalhe técnico para nerds curiosos. 🤓

Por baixo, na especificação técnica ASGI, essa é a parte do <a href="https://asgi.readthedocs.io/en/latest/specs/lifespan.html" class="external-link" target="_blank">Protocolo Lifespan</a>, e define eventos chamados `startup` e `shutdown`.

!!! info "Informação"

Поля `example` как такового не существует в стандартах **JSON Schema**. В последних версиях JSON-схемы определено поле <a href="https://json-schema.org/draft/2019-09/json-schema-validation.html#rfc.section.9.5" class="external-link" target="_blank">`examples`</a>, но OpenAPI 3.0.3 основан на более старой версии JSON-схемы, которая не имела поля `examples`.

```Python hl_lines="7  21  23"
{!../../../docs_src/custom_response/tutorial004.py!}
```

👉 🖼, 🔢 `generate_html_response()` ⏪ 🏗 & 📨 `Response` ↩️ 🛬 🕸 `str`.

🛬 🏁 🤙 `generate_html_response()`, 👆 ⏪ 🛬 `Response` 👈 🔜 🔐 🔢 **FastAPI** 🎭.

✋️ 👆 🚶‍♀️ `HTMLResponse` `response_class` 💁‍♂️, **FastAPI** 🔜 💭 ❔ 📄 ⚫️ 🗄 & 🎓 🩺 🕸 ⏮️ `text/html`:

<img src="/img/tutorial/custom-response/image01.png">

## 💪 📨

📥 💪 📨.

    "ignore:'cgi' is deprecated:DeprecationWarning",
    # For passlib
    "ignore:'crypt' is deprecated and slated for removal in Python 3.13:DeprecationWarning",
    # see https://trio.readthedocs.io/en/stable/history.html#trio-0-22-0-2022-09-28
    "ignore:You seem to already have a custom.*:RuntimeWarning:trio",
    "ignore::trio.TrioDeprecationWarning",
    # TODO remove pytest-cov
    'ignore::pytest.PytestDeprecationWarning:pytest_cov',

!!! note "Technical Details"

Il existe un script que vous pouvez exécuter localement pour tester tout le code et générer des rapports de couverture en HTML :

<div class="termy">

```console
$ bash scripts/test-cov-html.sh
```

</div>