from datetime import datetime from fastapi import FastAPI from fastapi.encoders import jsonable_encoder from pydantic import BaseModel fake_db = {} class Item(BaseModel): title: str timestamp: datetime description: str | None = None app = FastAPI() @app.put("/items/{id}") def update_item(id: str, item: Item): json_compatible_item_data = jsonable_encoder(item) fake_db[id] = json_compatible_item_data