Gnosis Utilities contains a number of Python libraries, most (but not all) related to working with XML. These include:

• gnosis.xml.pickle (XML pickling of Python objects)
• gnosis.xml.objectify (Any XML to "native" Python objects)
• gnosis.xml.validity (Enforce validity constraints)
• gnosis.xml.indexer (XPATH indexing of XML documents)
• gnosis.xml.relax (Tools for working with RelaxNG)
• gnosis.indexer (Full-text indexing/searching)
• [...].convert.txt2html (Convert ASCII source files to HTML)
• gnosis.util.dtd2sql (DTD -> SQL 'CREATE TABLE' statements)
• gnosis.util.sql2dtd (SQL query -> DTD for query results)
• gnosis.util.xml2sql (XML -> SQL 'INSERT INTO' statements)
• gnosis.util.combinators (Combinatorial higher-order functions)
• gnosis.util.introspect (Introspect Python objects)
• gnosis.magic (Multimethods, metaclasses, etc)

All credit goes to David Mertz as the original author of Gnosis

http://gnosis.cx/publish/tech_index_cp.html