python - How to use the Async def expression correctly?

Question

I make an asynchronous web application (using aiohttp, aiodocker and so on). Should I use async def expression to define function that just format strings, date, do calculations (like 6 + 6), parse data from json, etc.

    async def format_string_2_datetime(date_string: str) -> datetime:
        return datetime.fromisoformat(date_string)

or

    def format_string_2_datetime(date_string: str) -> datetime:
        return datetime.fromisoformat(date_string)

Answer 1

等待大神答复