Python FastAPI putting everything in main()

Question

In Python, I want to be able to write all my application methods in def main() and lastly just run the if __name__, but this way the FastAPI Swagger UI gives an error:

No operations defined in spec!

Basically, my code is something like this:

from fastapi import FastAPI
app = FastAPI()

def main():
    @app.get("/fast")
    async def fast(target: str, input_time: float):
        return (target, input_time)

if __name__ == '__main__':
    main()

Or just simply:

from fastapi import FastAPI
app = FastAPI()

if __name__ == '__main__':
    @app.get("/fast")
    async def fast(target: str, input_time: float):
        return (target, input_time)

Answer 1

Try like this

from fastapi import FastAPI

app = FastAPI()

@app.get("/fast")
async def fast(target: str, input_time: float):
    return (target, input_time)

Now run like this

uvicorn file_name:app --reload