I have been moderating a telegram group for some time and I have had no issues using the python-telegram-bot package. I actually love it. However, I can’t seem to get a functioning “Welcome Message” for when new users join.
Right now, I have tried structuring the function like I do with my command and message handlers:
def welcome(update,context):
#name = from_user.username
#update.message.reply_text("""Welcome blah blah blah to the group!""")
and then calling it it my main function like so:
dp = updater.dispatcher dp.add_handler(ChatMemberHandler(welcome, ChatMemberHandler.CHAT_MEMBER)) updater.start_polling(allowed_updates=Update.ALL_TYPES) updater.idle()
But am getting an error: AttributeError: ‘NoneType’ object has no attribute ‘reply_text’
So I guess the “member joined the group” pop up is not considered a message. But I dont know how to extract that event or which handler to use. Any help would be greatly appreciated! Thank you!
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Answer
As thethiny already pointed out, chatmember updates have no associated message: update.message will be None, while update.chat_member will be an instance of ChatMemberUpdated. Note that Message.reply_text is just a shortcut for Bot.send_message(chat_id=message.chat.id, ...), so as long as you have the chat_id you can just use e.g. context.bot.send_message – and you can get that chat_id from ChatMemberUpdated.chat. In fact, you can still use PTBs shortcuts, e.g. update.effective_chat.send_message.
Please check out the docs of
ChatMemberUpdated(official and PTB)Update.effective_chatChat.send_message
as well as the chatmemberbot.py example provided by PTB.
Disclaimer: I’m currently the maintainer of python-telegram-bot