Python Tkinter Linux Repair Question/ Python TCP Socket Example

[My Python]

1. Could u also quote some URLs for sample GUI programs written using
Tkinter. I am looking for any aubstantial app that has Canvas, Frame,
Button, LIstbox widgets, plus File Open/Save for simple text files.

2. Some good holistic article for positioning widgets on the frame/
canvas, basic concepts that are explained visually with diagrams.

TIA