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

<details markdown="1">
<summary>Oppure usa <code>async def</code>...</summary>

Se il tuo codice usa `async` / `await`, allora usa `async def`:

```Python hl_lines="7  12"
from fastapi import FastAPI
from typing import Optional

app = FastAPI()


@app.get("/")
async def read_root():

!¥MTimeÓ É ŸBÏÀ§MetaSys ¼x-minio-internal-inline-dataÄ true§MetaUsr‚¤etagÙ 83a7a4f493d028750df8¬content-type°application/json¡v ÎEà} ¤nullÄÑíe ÆN…ü·#÷y=(,ªi­pmwÄø[Ajû2íLÜrÑqÈ YÐ'ã±Ðí’«H d³WôČרD/Bxq Õ?,zN½‹·„Û ÓŸ 2̓Yz õ}( «Â(Om}$ƒ¯ì é3»ë ðoï 0ªýW½TUO DÙUüwãpê<)–ÝJ­ôŒlùL>`Z®Ž*ÅŠ•»vTQ5~ðnM4iÊÕ@øeTi®µÓ˸2é¾ÛËÀ ŸÄ}PÇv8v~:vu{ö Ï ùÐ2¦³-Ø‚A ÈÛt ˆØêi multisitea/data/disterasure/xl2/.minio.sys/buckets/bucket/.metadata.bin/xl.meta XL2 Æ } Ä$•Ä Ó É Ñ©XÈÄ Í#| Å Qƒ¤Type ¥V2ObjÞ ¢IDÄ ¤DDirÄ ­„ï P L;»ô5,éº ¡¦EcAlgo...