from tkinter import *
from tkinter import messagebox
class Application(Frame):
    def __init__(self, master=None):
        super(Application, self).__init__(master)
        self.pack()  # Widget加入到父容器
        self.create_widgets()
    def create_widgets(self):
        # 标签
        self.label = Label(self, text="hello world")
        self.label.pack()
        # 输入框
        self.entry = Entry(self)
        self.entry.pack()
        # 显示按钮
        self.show_button = Button(self, text="显示", command=self.hello)
        self.show_button.pack()
        # 退出按钮
        self.button = Button(self, text="quit", command=self.quit)
        self.button.pack()
    # 弹框函数
    def hello(self):
        name = self.entry.get() or "world"
        messagebox.showinfo("Message", "hello %s"% name)
if __name__ == '__main__':
    app = Application()
    # 设置窗口标题
    app.master.title("hello world")
    # 主消息循环
    app.mainloop()