Can't parse chat from a group. A group has a lot of chats and i need to parse one of them, not all the group. The. group has an id such as -10034123324 but chat in that group has id -10034123324_4329. When i'm trying to parse this chat i have an error:

return utils.get_input_peer(channels.chats[0]) ~~~~~~~~~~~~~~^^^ IndexError: list index out of range