Python and Tkinter by John E Grayson

[Mark R Rivet]

 I have a copy of this book and was wondering how relevant the content
is considering the publish date is 2000. Are people still using this
information? Anyone have any experience with this book? I guess what I
mean, is, any of the code in this book deprecated? or does it still
contain information used today the same as then. I mean, I guess some
things don't change right? For instance,  the derivative of x^2 is 2x
now and in the 1800's.