Dive Into Python

8.10. Summary

Python provides you with a powerful tool, sgmllib.py, to manipulate HTML by turning its structure into an object model. You can use this tool in many different ways.

parsing the HTML looking for something specific
aggregating the results, like the URL lister
altering the structure along the way, like the attribute quoter
transforming the HTML into something else by manipulating the text while leaving the tags alone, like the Dialectizer

Along with these examples, you should be comfortable doing all of the following things:

Using locals() and globals() to access namespaces
Formatting strings using dictionary-based substitutions