What's the simplest cross-platform way to pop up graphical dialogs in Python?

Question

I want the simplest possible way to pop up simple dialogs in Python scripts. Ideally, the solution would:

• Work on Windows, OS X, Gnome, KDE
• Look like

Answer 1

TkInter is usually supplied with Python

# File: hello1.py

from Tkinter import *

root = Tk()

w = Label(root, text="Hello, world!")
w.pack()

root.mainloop()

If you want something more native looking, you'll have to install something like wxpython