@app.get("/items/{item_id}")
async def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}
```

**Note**:

잘 모르겠다면, <a href="https://fastapi.tiangolo.com/async/#in-a-hurry" target="_blank">문서에서 `async`와 `await`</a>에 관한 _"급하세요?"_ 섹션을 확인해 보십시오.

</details>

### 실행하기

서버를 실행하십시오:

<div class="termy">

```console
$ uvicorn main:app --reload

Using Linux containers has several advantages including **security**, **replicability**, **simplicity**, and others.

!!! tip
    In a hurry and already know this stuff? Jump to the [`Dockerfile` below 👇](#build-a-docker-image-for-fastapi).

<details>
<summary>Dockerfile Preview 👀</summary>

```Dockerfile
FROM python:3.9

WORKDIR /code