import asyncio
import nbdler

async def main():
    request = nbdler.Request('http://a/file', file_path='file')
    async with nbdler.dlopen(request) as dl:
        dl.start()
        while not dl.is_finished():
            print((f'filename={dl.file.name}, '
                   f'transfer rate={round(dl.transfer_rate() / 1024)} kb/s, '
                   f'{round(dl.percent_complete(), 2)} % percent complete'))    
            await asyncio.sleep(1)
        await dl.ajoin()
            
asyncio.run(main())

import asyncio
import nbdler

async def main():
    request = nbdler.Request('http://a/file', 
                client_policy=nbdler.get_policy(http='aiohttp', https='requests'), 
                max_concurrent=16, file_path='file')
    request.put('https://b/file')
    async with nbdler.dlopen(request) as dl:
        await dl.astart()
        await dl.ajoin()
            
asyncio.run(main())