import EUDP

def client_loop(server,cli):
  pass # do stuff

server = EUDP.EUDPServer(IP, Port, "key") # client_loop will be called giving args server-obj and client 

server.send(client,msg) # sends msg
server.recv()     # recvs msg
server.close()    # close connection

client = EUDP.EUDPClient(IP, Port, "key") 

client.send(msg)  # send msg to server
client.recv()     # recv msg from server
client.close()    # close connection with server