Test syncify-like decorator to define both a Sync and Async client

syncify_test.py

import asyncio
import functools
from typing import Callable, Coroutine, Any, TypeVar, ParamSpec

T_Retval = TypeVar("T_Retval")
T_ParamSpec = ParamSpec("T_ParamSpec")


def syncify(async_function: Callable[T_ParamSpec, Coroutine[Any, Any, T_Retval]]) -> Callable[T_ParamSpec, T_Retval]:
    # Taken from https://github.com/tiangolo/asyncer and simplified
    @functools.wraps(async_function)
    def wrapper(*args: T_ParamSpec.args, **kwargs: T_ParamSpec.kwargs) -> T_Retval:
        loop = asyncio.new_event_loop()
        return loop.run_until_complete(async_function(*args, **kwargs))

    return wrapper


class AsyncClient:
    async def say_hello(self, name: str = "hf") -> str:
        """Say hello."""
        return f"Hello {name}!"


class Client:
    say_hello = syncify(AsyncClient.say_hello)


client = Client()
print(client.say_hello("world"))