• Table of contents
• Context based callbacks
• What exactly is CallbackContext
• Handler callbacks
• Error handler callbacks
• Job callbacks
• Note about groups and groupdict
• Note about version 13
• Custom handlers
• Handler changes
• CommandHandler
• PrefixHandler
• MessageHandler
• RegexHandler
• ConversationHandler
• Error handler
• Filters in handlers
• Combine filters using bitwise operators
• Also supports AND, NOT and more than 3 filters
• Special note about regex filters
• Special note about Filters.command and Filters.text:
• Persistence
• Return UTC from from_timestamp()