一个经典的Tkinter测试类

from tkinter import *
from tkinter import messagebox


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

    def createWidget(self):
        self.btn_login = Button(self, text="登录", command=self.login).pack()
        self.btn_Quit = Button(self, text="退出", command=root.destroy).pack()

    def login(self):
        messagebox.showinfo(message="登陆成功")


root = Tk()
root.title("一个经典的GUI测试类")
root.geometry("300x300+300+200")
app = Application(master=root)
root.mainloop()