Ref:
[Tkinter 教程12] 布局管理 (Pack Place Grid)
https://stackoverflow.com/questions/28089942/difference-between-fill-and-expand-options-for-tkinter-pack-method/28090362, pack 里的 expand, fill 参数讲清楚了
https://www.pythontutorial.net/tkinter/tkinter-pack/
Ref:
[Tkinter 教程12] 布局管理 (Pack Place Grid)
https://stackoverflow.com/questions/28089942/difference-between-fill-and-expand-options-for-tkinter-pack-method/28090362, pack 里的 expand, fill 参数讲清楚了
https://www.pythontutorial.net/tkinter/tkinter-pack/