We want to provide an abstraction for the callback_data parameter of InlineKeyboardButtons so that the library is capable of handling arbitrary objects and resolving them in CallbackQueryHandlers as opposed to just a string.

Deprecation

Updated Aug 12, 2017

Through all the versions we've acquired a lot of deprecated code, left intact for backwards compatibility. Overview so we won't leave them in forever.

ConversationHandler

Updated Jun 30, 2017

Changes to the ConversationHandler and the Handler system in general.