Beginners
[http://www.python.org/doc/Newbies.html Python for Beginners]
Topic guides
Advanced topics
Philosophy and wisdom
Other places
Use the GoogleTips to search the Python website.
[http://www.python.org/doc/ python.org Documentation Central]
[http://pydoc.org/ Search the library docstrings with pydoc]
[http://pydoc.amk.ca/frame.html Annotatable Documentation]
DocumentationTools describes tools you can use to generate documentation for your own Python programs.
Working on the official documentation
Discussion
Please see DocumentationDiscussion.