<div style="text-align: right; margin-right: 10%;">Timothy Crosley - <strong><a href="https://www.hug.rest/" target="_blank">Hug</a> creator</strong> <a href="https://news.ycombinator.com/item?id=19455465" target="_blank"><small>(ref)</small></a></div>

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## Intro

**FastAPI** n'existerait pas sans les précédentes contributions d'autres projets.

De nombreux outils ont été créés auparavant et ont contribué à inspirer sa création.

J'ai évité la création d'un nouveau framework pendant plusieurs années. J'ai d'abord essayé de combler toutes les
fonctionnalités couvertes par **FastAPI** en utilisant de nombreux frameworks, plug-ins et outils différents.

### Disable the automatic docs

The first step is to disable the automatic docs, as by default, those use the default CDN.

To disable them, set their URLs to `None` when creating your `FastAPI` app:

```Python hl_lines="8"
{!../../../docs_src/custom_docs_ui/tutorial001.py!}
```

### Include the custom docs

Now you can create the *path operations* for the custom docs.

To configure them, pass the `swagger_ui_parameters` argument when creating the `FastAPI()` app object or to the `get_swagger_ui_html()` function.

`swagger_ui_parameters` receives a dictionary with the configurations passed to Swagger UI directly.

and similar tools also use an **internal cache** when building the image, if a file hasn't changed since the last time building the container image, then it will **re-use the same layer** created the last time, instead of copying the file again and creating a new layer from scratch.

Just avoiding the copy of files doesn't necessarily improve things too much, but because it used the cache for that step, it can **use the cache for the next step**. For example, it could use the cache for the...

## A database dependency with `yield`

For example, you could use this to create a database session and close it after finishing.

Only the code prior to and including the `yield` statement is executed before creating a response:

```Python hl_lines="2-4"
{!../../../docs_src/dependencies/tutorial007.py!}
```

The yielded value is what is injected into *path operations* and other dependencies:

```Python hl_lines="4"

Chúng ta sử dụng dấu hai chấm (`:`), không phải dấu bằng (`=`).

Và việc thêm gợi ý kiểu dữ liệu không làm thay đổi những gì xảy ra so với khi chưa thêm chúng.

But now, imagine you are again in the middle of creating that function, but with type hints.

Tại cùng một điểm, bạn thử kích hoạt autocomplete với `Ctrl+Space` và bạn thấy:

<img src="/img/python-types/image02.png">

Es por eso que tiene mucho sentido usar código asíncrono ⏸🔀⏯ para las API web.

La mayoría de los framework populares de Python existentes (incluidos Flask y Django) se crearon antes de que existieran las nuevas funciones asíncronas en Python. Por lo tanto, las formas en que pueden implementarse admiten la ejecución paralela y una forma más antigua de ejecución asíncrona que no es tan potente como la actual.

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"_老實說，你建造的東西看起來非常堅固和精緻。在很多方面，這就是我想要的，看到有人建造它真的很鼓舞人心。_"

<div style="text-align: right; margin-right: 10%;">Timothy Crosley - <strong><a href="https://www.hug.rest/" target="_blank">Hug</a> creator</strong> <a href="https://news.ycombinator.com/item?id=19455465" target="_blank"><small>(ref)</small></a></div>

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"_如果您想學習一種用於構建 REST API 的**現代框架**，不能錯過 **FastAPI** [...] 它非常快速、且易於使用和學習 [...]_"

<div style="text-align: right; margin-right: 10%;">Timothy Crosley - <strong><a href="https://www.hug.rest/" target="_blank">Hug</a> creator</strong> <a href="https://news.ycombinator.com/item?id=19455465" target="_blank"><small>(ref)</small></a></div>

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