moving from tkinter to wxpython

[Barrowman]

Question: what is the significance of 67
used to select notebook page number and other things
seen here:

        # Selecting notebook page
        sel = self.nb.SetSelection(67)
        # first item in books
        # For making buttons
        # etc...

Is there a particular reason for this method, or is it because it did the trick?

It did the trick. As this is my first attempt at wxpython I know little about it. This worked so my attitude was why would I search for anything else. If there are a number of ways to do it maybe later as I get more familiar with it I would be in a better position to make the right decision over which to use. This is true of all the code in this project.