Gui Builder (Tkinter)

Bonjour à toutes et tous...
Gui Builder bien installé (sur Win8...). Pmw aussi (en console Python : " import Pmw " ne me siglale aucune erreur).

Cependant, le lancement du test ( "Start Test" ne change rien > Je ne vois pas ce que donnerait ma simple boîte de dialogue d'essai... Le code :

""" essai_01.py --

UI generated by GUI Builder Build 146 on 2013-10-06 09:27:58 from:
C:/Users/Basse/Documents/Exos_Tkinter/essai_01.ui
This file is auto-generated. Only the code within
'# BEGIN USER CODE (global|class)'
'# END USER CODE (global|class)'
and code inside the callback subroutines will be round-tripped.
The 'main' function is reserved.
"""

from Tkinter import *
from essai_01_ui import Essai_01

# BEGIN USER CODE global

# END USER CODE global

class CustomEssai_01(Essai_01):
pass

# BEGIN CALLBACK CODE
# ONLY EDIT CODE INSIDE THE def FUNCTIONS.

# _button_1_command --
#
# Callback to handle _button_1 widget option -command
def _button_1_command(self, *args):
pass

# _entry_1_invalidcommand --
#
# Callback to handle _entry_1 widget option -invalidcommand
def _entry_1_invalidcommand(self, *args):
pass

# _entry_1_validatecommand --
#
# Callback to handle _entry_1 widget option -validatecommand
def _entry_1_validatecommand(self, *args):
pass

# _entry_1_xscrollcommand --
#
# Callback to handle _entry_1 widget option -xscrollcommand
def _entry_1_xscrollcommand(self, *args):
pass

# END CALLBACK CODE

# BEGIN USER CODE class

# END USER CODE class

def main():
# Standalone Code Initialization
# DO NOT EDIT
try: userinit()
except NameError: pass
root = Tk()
demo = CustomEssai_01(root)
root.title('essai_01')
try: run()
except NameError: pass
root.protocol('WM_DELETE_WINDOW', root.quit)
root.mainloop()

if __name__ == '__main__': main()

Merci de vos éventuels éclaircissements