change between web pages with python script

[gruntfutuk]

You can create a webpage, i.e. html, by just writing strings of html to a text file:

• programming historian
  
• Loyola University Chicago
  

If you want your application to actually serve web pages, then you can hand code the work but you would probably be best looking at a framework like Flask (or django for a large application). There are lots of alternatives.

If you want to read an existing website, then take a look at part of the book Automate the Boring Stuff with Python.