Citește codul cu atenție

import asyncio


async def fetch(sem: asyncio.Semaphore, name: str) -> str:
    async with sem:
        # Stand-in for a real I/O call.
        await asyncio.sleep(0.001)
        return name


async def main() -> list[str]:
    sem = asyncio.Semaphore(2)
    names = ["a", "b", "c", "d", "e"]
    results = await asyncio.gather(*[fetch(sem, n) for n in names])
    return results


print(asyncio.run(main()))

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