def add_bar(self, bar):
    assert isinstance(bar,InfoBarGtk)
    if bar.has_close_button == False:
      bar.add_close_button(lambda: True)

    def close_bar():
      if bar.get_parent():
        self.close_bar(bar)

    bar.after_button_pressed.add_listener(close_bar)

    grp = gtk.VBox()
    if 1 >= self._num_bars:
      sep = _BSeparator()
      grp.pack_start(sep)
    grp.pack_start(bar)
    self.pack_start(grp)
    grp.show_all()
    self._num_bars += 1
dataset/ETHPy150Open natduca/quickopen/src/info_bar_gtk.py/InfoBarGtkCollection.add_bar/swapped operands of `>=`