python import aiofiles import asyncio async def read_file(): async with aiofiles.open('file.txt', mode='r') as f: contents = await f.read() print(contents) loop = asyncio.get_event_loop() loop.run_until_complete(read_file()) python import aiofiles import asyncio async def write_file(): async with aiofiles.open('file.txt', mode='w') as f: await f.write('Hello, aiofiles!') loop = asyncio.get_event_loop() loop.run_until_complete(write_file()) python import aiofiles import asyncio async def copy_file(): async with aiofiles.open('source.txt', mode='r') as src, \ aiofiles.open('destination.txt', mode='w') as dst: contents = await src.read() await dst.write(contents) loop = asyncio.get_event_loop() loop.run_until_complete(copy_file())