{* ../../docs_src/server_sent_events/tutorial001_py310.py ln[1:25] hl[10:12,23] *}

/// tip

As Pydantic will serialize it in the **Rust** side, you will get much higher **performance** than if you don't declare a return type.

///

### Non-async *path operation functions* { #non-async-path-operation-functions }

If you declare the return type, FastAPI will use it to **validate** the data, **document** it in OpenAPI, **filter** it, and **serialize** it using Pydantic.

/// tip

As Pydantic will serialize it in the **Rust** side, you will get much higher **performance** than if you don't declare a return type.

///

### Non-async *path operation functions* { #non-async-path-operation-functions }

* [Daphne](https://github.com/django/daphne): ASGI‑сервер, созданный для Django Channels.
* [Granian](https://github.com/emmett-framework/granian): HTTP‑сервер на Rust для Python‑приложений.
* [NGINX Unit](https://unit.nginx.org/howto/fastapi/): NGINX Unit — лёгкая и многофункциональная среда выполнения веб‑приложений.

* [Daphne](https://github.com/django/daphne): servidor ASGI construído para Django Channels.
* [Granian](https://github.com/emmett-framework/granian): um servidor HTTP Rust para aplicações Python.
* [NGINX Unit](https://unit.nginx.org/howto/fastapi/): NGINX Unit é um runtime de aplicação web leve e versátil.

## Máquina Servidora e Programa Servidor { #server-machine-and-server-program }

{* ../../docs_src/stream_json_lines/tutorial001_py310.py ln[1:24] hl[9:11,22] *}

如果你声明了返回类型，FastAPI 会用它来验证数据、在 OpenAPI 中生成文档、进行过滤，并使用 Pydantic 进行序列化。

/// tip | 提示

由于 Pydantic 会在 Rust 侧进行序列化，如果你声明了返回类型，将获得更高的性能。

///

### 非异步的*路径操作函数* { #non-async-path-operation-functions }

你也可以使用常规的 `def` 函数（不带 `async`），并以同样的方式使用 `yield`。

FastAPI 会确保其正确运行，不会阻塞事件循环。

* [Daphne](https://github.com/django/daphne): Django Channels için geliştirilmiş ASGI server.
* [Granian](https://github.com/emmett-framework/granian): Python uygulamaları için bir Rust HTTP server.
* [NGINX Unit](https://unit.nginx.org/howto/fastapi/): NGINX Unit, hafif ve çok yönlü bir web uygulaması runtime'ıdır.

## Sunucu Makinesi ve Sunucu Programı { #server-machine-and-server-program }

如果你把回傳型別宣告為 `AsyncIterable[Item]`，FastAPI 會用它來透過 Pydantic 進行**驗證**、**文件化**與**序列化**。

{* ../../docs_src/server_sent_events/tutorial001_py310.py ln[1:25] hl[10:12,23] *}

/// tip

因為 Pydantic 會在 **Rust** 端進行序列化，如果你有宣告回傳型別，效能會比未宣告時高很多。

///

### 非 async 的路徑操作函式 { #non-async-path-operation-functions }

你也可以使用一般的 `def` 函式（沒有 `async`），並同樣使用 `yield`。

FastAPI 會確保正確執行，不會阻塞事件迴圈。

* [Daphne](https://github.com/django/daphne): the ASGI server built for Django Channels.
* [Granian](https://github.com/emmett-framework/granian): A Rust HTTP server for Python applications.
* [NGINX Unit](https://unit.nginx.org/howto/fastapi/): NGINX Unit is a lightweight and versatile web application runtime.

* [Daphne](https://github.com/django/daphne): Django Channels를 위해 만들어진 ASGI 서버.
* [Granian](https://github.com/emmett-framework/granian): Python 애플리케이션을 위한 Rust HTTP 서버.
* [NGINX Unit](https://unit.nginx.org/howto/fastapi/): NGINX Unit은 가볍고 다용도로 사용할 수 있는 웹 애플리케이션 런타임입니다.

## 서버 머신과 서버 프로그램 { #server-machine-and-server-program }

이름에 관해 기억해 둘 작은 디테일이 있습니다. 💡

* [Daphne](https://github.com/django/daphne): el servidor ASGI construido para Django Channels.
* [Granian](https://github.com/emmett-framework/granian): Un servidor HTTP Rust para aplicaciones en Python.
* [NGINX Unit](https://unit.nginx.org/howto/fastapi/): NGINX Unit es un runtime para aplicaciones web ligero y versátil.

## Máquina Servidor y Programa Servidor { #server-machine-and-server-program }