code: def _key_paren_left(self, text):
          
          self.current_prompt_pos = self.parentWidget()._prompt_pos
          if self.get_current_line_to_cursor():
              last_obj = self.get_last_obj()
              if last_obj and not last_obj.isdigit():
                  self.show_object_info(last_obj)
          self.insert_text(text)
docs: Action for '('