Function spin

19-concurrency/primes/spinner_prime_async_nap.py:31–40

(msg: str)

async def spin(msg: str) -> None:
    for char in itertools.cycle(r'\|/-'):
        status = f'\r{char} {msg}'
        print(status, flush=True, end='')
        try:
            await asyncio.sleep(.1)
        except asyncio.CancelledError:
            break
    blanks = ' ' * len(status)
    print(f'\r{blanks}\r', end='')

async def check(n: int) -> int:
    return await is_prime(n)