Epydoc is a tool for generating API documentation for Python modules, based on their docstrings. For an example of epydoc's output, see the API documentation for epydoc itself (html, pdf). A lightweight markup language called epytext can be used to format docstrings, and to add information about specific fields, such as parameters and instance variables. Epydoc also understands docstrings written in ReStructuredText, Javadoc, and plaintext.
The latest release of epydoc (version 2.0) can be downloaded from the SourceForge download page. See Installing Epydoc for more information.
For a more extensive example of epydoc's output, see the API documentation for Python 2.2.