While working on my personal bot, I found building menus with InlineKeyboardMarkups to be somewhat tiresome sometimes. You have to build a lot of InlineKeyboardButtons, add a lot of CallbackQueryHandlers to your ConversationHandler and keep the overview in the process.

This is an attempt to build a more user friendly handler as "wrapper" on top of the ConversationHandler for creating menus. For each state only the following information is needed:

• A message text
• An array of (button_label, next_state)-type tuples
• optionally a callback to handle the user input

All the labels/text may also be replaced by a callback to adjust the texts according to the user input, but that is optional.
A InlineMenuHandler could look like this:

InlineMenuHandler(
    name = 'imh',
    start_command='start',
    parse_mode='Markdown',
    menus = {
       InlineMenuHandler.MAIN_MENU : (
            '*Menu 1:* _Top Level Menu_',
            [
                [('1.1', '1.1'), ('1.1', '1.1')],
                [('1.2', '1.2'), ('1.2', '1.2')]
            ]
        ),
        '1.1': (
            '*Menu 1.1:* _One Of Two Lower Level Menus_',
            [
                [('1', InlineMenuHandler.MAIN_MENU), ('1.2', '1.2')]
            ]
        ),
        '1.2': (
            description_callback,
            [
                [('1', InlineMenuHandler.MAIN_MENU), ('End', ConversationHandler.END)]
            ],
            parse_input_callback
        ),
        ConversationHandler.END: (
            'The conversation ends here. Bye'
        )
    },
    fallbacks = [CommandHandler('cancel', fallback)]
)

Especially for menus that need little processing of the user input, I hope that this is easier to maintain than a full grown ConversationHandler.

I'm aware that such a new feature will needs thorough discussion, may well be rejected and also that we have other issues to discuss in dev chat :D Still, I wanted to put it out here.