from typing import Union
from fastapi import FastAPI

app = FastAPI()


class Item:
    name: str
    price: float
    is_offer: Union[bool, None] = None


@app.get("/")
async def read_root():
    return {"Hello": "World"}


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


# @app.put("/items/{item_id}")
# async def update_item(item_id: int, item: Item):
#    return {"item_name": item.name, "item_id": item_id}