I saw a duplicated docstring while looking through the source; I updated to reflect the function's behavior. This is against the current git trunk.
I saw that patches were solicited on your blog; it wasn't clear whether to submit them to SF or directly to you. In any case I wasn't able to find an email addy for you, so here it is.
I was also unable to get the 0.3.2-1 deb package to work, but was able to hack the source enough to at least get it running. Very nice, and I'm happy to be able to run my WM in Python - don't have to be envious of the Lua and Haskell people anymore :P
A patch to the dosctring of query.runPython.