def _select_all_entry_data(self):
        ''' Set selection on the whole text '''
        self._entry_popup.selection_range(0, 'end')

        # returns 'break' to interrupt default key-bindings
        return 'break'
 Set selection on the whole text 
recipes/Python/580746_Tkinter_treeview_like_table_or_multicolumn/recipe-580746.py