'Update the additional help entries on the Help menu'

def reset_help_menu_entries(self):

    help_list = idleConf.GetAllExtraHelpSourcesList()
    helpmenu = self.menudict['help']
    helpmenu_length = helpmenu.index(END)
    if (helpmenu_length > self.base_helpmenu_length):
        helpmenu.delete((self.base_helpmenu_length + 1), helpmenu_length)
    if help_list:
        helpmenu.add_separator()
        for entry in help_list:
            cmd = self.__extra_help_callback(entry[1])
            helpmenu.add_command(label=entry[0], command=cmd)
    self.menudict['help'] = helpmenu
