wxPython sizer wxGridSizer的父类方法奇怪地无法访问

I am having an issue with wxPython toolkit. I am using a wx.GridSizer object to place a grid displaying some status info. I need to update this grid, and so I came up with a few different ways of doing it. The one I prefer is to simply refresh/update the text that needs the updating, so I could try detaching the wxStaticText object from the sizer, overwriting it with a new wxStaticText object, and inserting the object back into the sizer at its previous index.I am having an issue with wxPython toolkit. I a