python 使用tkinter与messagebox写界面和弹窗

from tkinter import *
from tkinter import messagebox  # python3.0的messagebox，属于tkinter的一个组件

top = Tk()  #。生成窗口
top.title("grid test")  #  窗口标题
top.geometry('300x400')  #。窗口大小


def box():
    return messagebox.askyesno(title='弹窗', message='内容')


Popup1 = Button(top, text="按钮1", fg="blue", bd=2, width=5, command=box, state="normal")
Popup1.grid(row=1, column=1, sticky='E')

Popup2 = Button(top, text="按钮2", fg="yellow", bd=2, width=5, command=box, state="normal")
Popup2.grid(row=2, column=2, sticky='NE')

    if s == CANCEL or s == NO:
        return None
    elif s == YES:
        return YES

from tkinter import *
from tkinter import messagebox


tk = Tk()
tk.title('测试')
tk.geometry('100x200')
nub = 1


def Popup1():
    global nub
    '''
    askyesnocancel 弹窗:  方法解释是这样的
    Ask a question; return true if the answer is yes, None if cancelled.
    '''
    d = messagebox.askyesnocancel(title='问题', message='python \n你是否愿意继续学习下去？')
    while True:
        if d is None:
            n = Popup2(nub)
            if n is None:
                pass
            else:
                messagebox.showinfo(title=' 提示 ', message='坚持就是胜利！\n加油！一起继续学习下去！')
                #  关闭弹窗
                tk.destroy()
                return
        else:
            return
        nub += 1


def Popup2(value):
    return messagebox.askyesnocancel(title='选择', message='你选择的第%s次' % value)


d = Button(tk, text='开始选择', fg='blue', bd=2, width=10, command=Popup1)
d.grid(row=1, column=1, sticky='NE')


tk.mainloop()