[lwf]

Dropbox sponsors most of the developers of http://mypy-lang.org/ , an optional static typing system for Python.

I've found it to be hugely useful in safely working in a large Python codebase :)

(NB: I work at Dropbox)

[mroche]

Curious if you’ve ever tried Cython out. Not quite the same, but a semi-similar end goal to a degree. I started looking into the other day and it might provide some nice improvements to heavier applications.