TypeError: sendto() takes 2 or 3 arguments (1 given)

Question

I got an error when im trying to do the function send to, ¿Anyone knows why?

while message != 'q':
if message != '':
envio = alias + ": " + message, server
s.sendto(str(envio).encode('utf-8'))
#por si quiere enviar mas mensajes
tLock.acquire()
message = input (alias + "-> ")
tLock.release()
time.sleep(0.2)
shutdown = True