fastapi

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from typing import Union
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from fastapi import Body, FastAPI
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from pydantic import BaseModel
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app = FastAPI()
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class Item(BaseModel):
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    name: str
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    description: Union[str, None] = None
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    price: float
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    tax: Union[float, None] = None
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class User(BaseModel):
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    username: str
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    full_name: Union[str, None] = None
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@app.put("/items/{item_id}")
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async def update_item(
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    *,
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    item_id: int,
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    item: Item,
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    user: User,
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    importance: int = Body(gt=0),
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    q: Union[str, None] = None,
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):
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    results = {"item_id": item_id, "item": item, "user": user, "importance": importance}
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    if q:
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        results.update({"q": q})
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    return results
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