Calling Python from Haskell
In a past version of this blog I used Pandoc to convert Markdown to HTML. It's by far the best and most powerful markdown converter, but it has one, albeit little weakness: Its syntax highlighting is based highlighting-kate, which is less good and supports less languages than the Python library Pygments, the de-facto standard highlighter used by Github and others.
It's easy to implement custom highlighting thanks to the great API of Pandoc, with just two functions in Text.Highlighting.Pygments.Pandoc: