How to confirm transactions on steam?

Question

Python

I found a library on github: https://github.com/bukson/steampy
And in it I'm interested in confirming transactions in steam (sda). I even found a function responsible for this, but I can not understand what's what. Here she is:

def _confirm_transaction(self, trade_offer_id: str) -> dict:
        confirmation_executor = ConfirmationExecutor(self.steam_guard['identity_secret'], self.steam_guard['steamid'],
                                                     self._session)
        return confirmation_executor.send_trade_allow_request(trade_offer_id)

What is "self"? And where should I get the trade_offer_id from?
Help please who fumbles! :h

Answer 1

self
offer id