Zed has started an interesting experiment on Learning Python the Hard Way.
Looks to be an effective approach to learning Python, but I’m more intrigued by the tools used. From a set of text files in a fossil repository there is a make file that builds the complete book as a PDF file. Seems like it could be something I could use for other projects, the only awkward bit about it being the size of the TeX installation needed to support the pdflatex generation process.