def METHOD_NAME(self, widget):
    model, sel_iter = self.tv.get_selection().get_selected()
    if sel_iter is None:
        return
    sought = model.get_value(sel_iter, 0)
    player1 = self.connection.username
    player2 = sought.player.name
    game_type = sought.game_type.short_fics_name
    self.connection.glm.assess(player1, player2, game_type)
    self.assess_sent = True