python之tkinter使用-消息弹框

 # messagebox:消息弹框
 # 不断点击按钮，切换各种弹窗
 import tkinter as tk
 from tkinter import messagebox
 from tk_center_win import set_win_center

 root = tk.Tk()
 root.title('消息框')
 root.geometry('190x80+300+300')  # 设置窗口大小和位置
 # set_win_center(root, 190, 80)  # 设置窗口大小并居中显示
 n = 0
 str_var = tk.StringVar()
 str_var.set('askokcancel')

 def cmd():
     '''弹框提示'''
     global n
     global str_var
     n += 1
     if n == 1:
         r = messagebox.askokcancel('消息框', 'askokcancel')
         print('askokcancel:', r)
         str_var.set('askquestion')
     elif n == 2:
         r = messagebox.askquestion('消息框', 'askquestion')
         print('askquestion:', r)
         str_var.set('askyesno')
     elif n == 3:
         r = messagebox.askyesno('消息框', 'askyesno')
         print('askyesno:', r)
         str_var.set('askretrycancel')
     elif n == 4:
         r = messagebox.askretrycancel('消息框', 'askretrycancel')
         print('askretrycancel:', r)
         str_var.set('showerror')
     elif n == 5:
         r = messagebox.showerror('消息框', 'showerror')
         print('showerror:', r)
         str_var.set('showinfo')
     elif n == 6:
         r = messagebox.showinfo('消息框', 'showinfo')
         print('showinfo:', r)
         str_var.set('showwarning')
     else:
         r = messagebox.showwarning('消息框', 'showwarning')
         print('showwarning:', r)
         str_var.set('askokcancel')
         n = 0

 label = tk.Label(root, text='不断点击按钮，切换各种弹窗', font='宋体 -14', pady=8)
 label.grid()
 btn = tk.Button(root, width='', textvariable=str_var, command=cmd)
 btn.grid()

 root.mainloop()

截图：