from fastapi import FastAPI app = FastAPI() @app.get("/items/", tags=["items"]) async def read_items(): return [{"name": "Foo", "price": 42}] @app.get("/users/", tags=["users"]) async def read_users(): return [{"username": "johndoe"}] @app.get("/elements/", tags=["items"], deprecated=True) async def read_elements(): return [{"item_id": "Foo"}]