from typing import Union

from fastapi import Body, FastAPI

from pydantic import BaseModel

app = FastAPI()

class Item(BaseModel):

name: str

description: Union[str, None] = None

price: float

tax: Union[float, None] = None

@app.put("/items/{item_id}")

async def update_item(

*,

item_id: int,

item: Item = Body(

examples=[

{

"name": "Foo",

"description": "A very nice Item",

"price": 35.4,

"tax": 3.2,

},

{

"name": "Bar",

"price": "35.4",

},

{

"name": "Baz",

"price": "thirty five point four",

},

],

),

):

results = {"item_id": item_id, "item": item}

return results