import asyncio
from caio import AsyncioContext

loop = asyncio.get_event_loop()

async def main():
    # max_requests=128 by default
    ctx = AsyncioContext(max_requests=128)

    with open("test.file", "wb+") as fp:
        fd = fp.fileno()

        # Execute one write operation
        await ctx.write(b"Hello world", fd, offset=0)

        # Execute one read operation
        print(await ctx.read(32, fd, offset=0))

        # Execute one fdsync operation
        await ctx.fdsync(fd)

        op1 = ctx.write(b"Hello from ", fd, offset=0)
        op2 = ctx.write(b"async world", fd, offset=11)

        await asyncio.gather(op1, op2)

        print(await ctx.read(32, fd, offset=0))
        # Hello from async world


loop.run_until_complete(main())