<img src="/img/python-types/image06.png">

توجه کن که این یعنی "`one_person` یه **نمونه** از کلاس `Person` هست".

یعنی "`one_person` خود **کلاس** به اسم `Person` نیست".

## مدل‌های Pydantic

<a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic</a> یه کتابخونه پایتونه برای اعتبارسنجی داده‌ها.

"شکل" داده‌ها رو به‌عنوان کلاس‌هایی با ویژگی‌ها تعریف می‌کنی.

و هر ویژگی یه نوع داره.

Underneath, in the ASGI technical specification, this is part of the <a href="https://asgi.readthedocs.io/en/latest/specs/lifespan.html" class="external-link" target="_blank">Lifespan Protocol</a>, and it defines events called `startup` and `shutdown`.

/// info

You can read more about the Starlette `lifespan` handlers in <a href="https://www.starlette.io/lifespan/" class="external-link" target="_blank">Starlette's  Lifespan' docs</a>.

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

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