websocket/send.py

import asyncio
import websockets
import sys

async def hello(message):
        args=message.split(':')
        #server="vangogh.fmf.uni-lj.si"
        server=args[0];
        message=':'.join(args[1:])
        uri = "ws://{}:8765".format(server)
        origin="merlin"
        async with websockets.connect(uri,origin=origin) as websocket:
            print('Sending {}'.format(message))

            await websocket.send(message)
            print(">>> {}".format(message))
            #receive nothing
            #greeting = await websocket.recv()
            #print(f"<<< {greeting}")

if __name__ == "__main__":
    message=sys.argv[1]
    loop = asyncio.get_event_loop()
    # Blocking call which returns when the hello_world() coroutine is done
    loop.run_until_complete(hello(message))
    loop.close()