import asyncio
from typing import AsyncGenerator, AsyncIterator


async def gen() -> AsyncGenerator[int, None]:
    for x in [1, 2, 3]:
        yield x


async def gen2() -> AsyncIterator[int]:
    for x in [1, 2, 3]:
        yield x


async def main():
    async for x in gen():
        print(x)
    async for x in gen2():
        print(x)


asyncio.run(main())