read_aiofiles.py

import aiofiles
import asyncio
async def red():
    print('where did lost ')
    async with aiofiles.open('data.txt', mode='r') as f:
        contents = await f.read()
    return contents
events = asyncio.get_event_loop()
try:
    coro = events.run_until_complete(red())
    print('files content is: "{}"'.format(coro))
    
finally:
    print('end')
    events.close()