Martin Saturka added the comment:
When I do in Python 2.x (e.g. 2.6) next:
import Tkinter as T
import tkFileDialog as F
t = T.Tk()
dn = F.askdirectory()
It pop-ups the dialog, it is OK. Analogical case for Python 3.0 does not
work, at
New submission from Martin Saturka :
Directory selection from Tkinter part of Python 3.0, i.e. "askdirectory"
function from tkinter.filedialog does not work. It works for 2.x Python,
other Tkinter functions (askopenfilename, asksaveasfilename) work well
at both 2.x and 3.