fastapi

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from typing import Annotated, Union
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from fastapi import FastAPI, Path
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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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@app.put("/items/{item_id}")
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async def update_item(
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    item_id: Annotated[int, Path(title="The ID of the item to get", ge=0, le=1000)],
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    q: Union[str, None] = None,
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    item: Union[Item, None] = None,
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):
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    results = {"item_id": item_id}
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    if q:
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        results.update({"q": q})
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    if item:
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        results.update({"item": item})
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    return results
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