Text-文本撤销

 #撤销操作
 from tkinter import *
 master = Tk()
 #打开undo按钮
 text=Text(master,width=30,height=5,undo=True)
 text.pack()
 text.insert(INSERT,'I love coding')

 def show():
     text.edit_undo()
 b = Button(master,text='撤销',command=show)
 b.pack()

 mainloop()