Matplotlib未导入，脚本仍然打开绘图

Question

所以我有这个简单的python代码

if (VisualTreeHelper.GetParent(this) is ContentPresenter contentPresenter)
{
    if (VisualTreeHelper.GetParent(contentPresenter) is RingsStackpanel ringStackPanel
        && RingHolder.ItemsSource is ObservableCollection<YourItemType> dataItems
        && contentPresenter.DataContext is YourItemType dataItem)
    {
        //wait for the ContentPresenter to get unloaded
        RoutedEventHandler handler = null;
        handler = (ss, ee) =>
        {
            //remove the parent-child relationship:
            ringStackPanel.RemoveElement(contentPresenter);

            contentPresenter.Unloaded -= handler;
        };
        //remove the data object
        dataItems.Remove(dataItem);
    }
}

由于某种原因，我将其打印出来

  

1.7320508075688772

     

2.23606797749979

     

2.6457513110645907

     

3.0

它也打开了这个pyplot https://i.imgur.com/lHi3X2y.png

当关闭图像时，它会打印出实际的df.head，而且

  

[5行x 12列]

这不可能发生，所以我非常困惑。