#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import os, sys
try:
    from tkinter import *
except ImportError:  #Python 2.x
    PythonVersion = 2
    from Tkinter import *
    from tkFont import Font
    from ttk import *
    from tkMessageBox import *
    import tkFileDialog
else:  #Python 3.x
    PythonVersion = 3
    from tkinter.font import Font
    from tkinter.ttk import *
    from tkinter.messagebox import *


class Application(Frame):
    def __init__(self, master=None):
        Frame.__init__(self, master)
        self.pack()
        self.createWidgets()

    def createWidgets(self):
        self.nameInput = Entry(self)
        self.nameInput.pack()
        self.alertButton = Button(self, text='Hello', command=self.hello)
        self.alertButton.pack()

    def hello(self):
        name = self.nameInput.get() or 'world'
        messagebox.showinfo('Message', 'Hello, %s' % name)

app = Application()
# 设置窗口标题:
app.master.title('Hello World')
# 主消息循环:
app.mainloop()
