XML Databases
Forest
Forest is a (native) XML database written in Python. It is intended to support fast queries of XML data.
https://infrae.com/viewvc/old/forest/
4ODS
xsdbXML
BaseX
BaseX is a very fast and powerful, yet light-weight XML database system and XPath/XQuery processor, including highly conformant support for the latest W3C Update and Full Text Recommendations. Bindings for python are avaible.