根据python + tkinter中菜单的选择更新的菜单按钮

Question

How can I get the menubutton text to update according to my selection in the menu? If I select opt1 I would like that the menubutton text updated to "opt1" after releasing/exiting the menu. Below is a simple example.

#!/usr/bin/python
#
from Tkinter import *

root = Tk()


def opt1():
    print "opt 1 selected "
    return;
def opt2():
    print "opt 2 selected "
    return;
def opt3():
    print "opt 3 selected "
    return;

elementTypeBtn = Menubutton(root, relief='raised', text='select sth')
elementTypeBtn.grid(row=0, column=0)
elementTypeBtn.menu = Menu(elementTypeBtn)
elementTypeBtn.menu.add_command(label='opt1', underline=0, command=opt1)
elementTypeBtn.menu.add_command(label='opt2', underline=0, command=opt2)
elementTypeBtn.menu.add_command(label='opt3', underline=0, command=opt3)
elementTypeBtn['menu'] = elementTypeBtn.menu

root.mainloop()

Answer 1

Similar to how you update any attribute of any widget, you call the config (or configure ) method that is common to all widgets:

def opt1():
    elementTypeBtn.configure(text="opt 1 selected")
    return;