import asyncio
import itertools
import sys


async def spin(msg):
    write, flush = sys.stdout.write, sys.stdout.flush
    for char in itertools.cycle('|/-\\'):
        status = f"{char} {msg}"
        write(status)
        flush()
        write('\x08' * len(status))  # backspace out the line
        try:
            await asyncio.sleep(.1)
        except asyncio.CancelledError:
            break
    write(' ' * len(status) + '\x08' * len(status))


async def slow_function():
    await asyncio.sleep(3)
    return 42


async def supervisor():
    spinner = loop.create_task(spin('Thinking!'))
    print('Spinner Object:', spinner)
    result = await slow_function()
    spinner.cancel()
    return result


if __name__ == '__main__':
    try:
        loop = asyncio.get_event_loop()
        # returns a Task object, not the result objects themselves. You have to access the Task result
        # to see the output
        result = loop.run_until_complete(supervisor())
    except Exception as e:
        pass
    finally:
        loop.close()