{{- end }}
  * Review the list of actively supported releases, CVE publications and our hardening guide:
    * https://istio.io/latest/docs/releases/supported-releases/
    * https://istio.io/latest/news/security/
    * https://istio.io/latest/docs/ops/best-practices/security/

For further documentation see https://istio.io website

{{-
  $deps := dict

* News about FastAPI and friends 🚀
* Guides 📝
* Features ✨
* Breaking changes 🚨
* Tips and tricks ✅

## Follow FastAPI on Twitter

<a href="https://twitter.com/fastapi" class="external-link" target="_blank">Follow @fastapi on **Twitter**</a> to get the latest news about **FastAPI**. 🐦

## Star **FastAPI** in GitHub

If you have AuthorizationPolicies that reference port these ports, you should update them during this process,
or customize the ports to match the old defaults.
See the [security advisory](https://istio.io/latest/news/security/istio-security-2021-002/) for more information.

#### Other migrations

If you see errors like `rendered manifests contain a resource that already exists` during installation, you may need to forcibly take ownership.

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

---

<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>

---

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

---

"_REST API를 만들기 위해 **현대적인 프레임워크**를 찾고 있다면 **FastAPI**를 확인해 보십시오. [...] 빠르고, 쓰기 쉽고, 배우기도 쉽습니다 [...]_"

---

"_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>

---

"_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 [...]_"

"_我們的 **APIs** 已經改用 **FastAPI** [...] 我想你會喜歡它 [...]_"

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

---

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

---

The `name` parameter is **still required** (not *optional*) because it doesn't have a default value. Still, `name` accepts `None` as the value:

```Python
say_hi(name=None)  # This works, None is valid 🎉
```

The good news is, once you are on Python 3.10 you won't have to worry about that, as you will be able to simply use `|` to define unions of types:

```Python hl_lines="1  4"
{!../../../docs_src/python_types/tutorial009c_py310.py!}
```