gtk.FILE_CHOOSER_ACTION_SELECT_FOLDER permet de choisir la sélection d’un dossier et pas d’un fichier.
dialog = gtk.FileChooserDialog('libelle',
None,
gtk.FILE_CHOOSER_ACTION_SELECT_FOLDER,
(gtk.STOCK_CANCEL, gtk.RESPONSE_CANCEL,
gtk.STOCK_OPEN, gtk.RESPONSE_OK))
dialog.set_default_response(gtk.RESPONSE_OK)
response = dialog.run()
if response == gtk.RESPONSE_OK:
print dialog.get_filename()
elif response == gtk.RESPONSE_CANCEL:
pass
dialog.destroy()