Problem with a dialog

[ast]

"Steven D'Aprano" <steve+comp.lang.python at pearwood.info> a écrit dans le message de 
news:54898820$0$12989$c3e8da3$5496439d at news.astraweb.com...

> You can make "test" global by declaring it global:
>
> def try_():
>    global test
>    test = True
>    setup = MyDialog(root)
>
>
>
> If that solves your problem to your satisfaction, you can stop reading now.
>

Since try() is a callback function called when a button is pushed,
with the effect to open a dialog, I tried to define MyDialog class
inside try(). The program is the following and it works. I no
longer need to define test as global.
Is it a good practice to define a class inside a function ?


from tkinter import *
import tkinter.simpledialog

def try_():

    class MyDialog(tkinter.simpledialog.Dialog):

        def body(self, master):
            print(test)

        def apply(self):
            pass


    test = True
    setup = MyDialog(root)


root = Tk()
try_()