#import cilent from Tkinter import * from socket import * import login import MainWindow ADDR = ('202.114.196.97', 21568) udpCliSock = socket(AF_INET, SOCK_DGRAM) Success_Login = [0, 1] root = Tk() app = login.Login(root, udpCliSock, Success_Login) app.mainloop() print Success_Login[0] if (Success_Login[0] == 1): root = Tk() app = MainWindow.MyApp(root, udpCliSock) app.mainloop() data = "06#" udpCliSock.sendto(data, ADDR) data1, addr = udpCliSock.recvfrom(1024)