The hydedown repo contains the relavant extensions.
This is a Python implementation of John Gruber's Markdown. It is almost completely compliant with the reference implementation, though there are a few known issues. See Features for information on what exactly is supported and what is not. Additional features are supported by the Available Extensions.
Installation and usage documentation is available in the docs/ directory
of the distribution and on the project website at
http://packages.python.org/Markdown/.
You may ask for help and discuss various other issues on the mailing list and report bugs on the bug tracker.