python-doc/Docs/Services/FastAPI/02-Simple-Route.md

from fastapi import FastAPI

app = FastAPI()


@app.get("/")
def home_dir():
    return {"message": "Home Pag"}

fastapi dev main.py

use uvicorn as defualt runner or we can run with uvicorn command

uvicorn main:app --reload --host 0.0.0.0 --port 1234