As others have noted, this is a somewhat dated article. Indeed, the github page for llvmpy (https://github.com/llvmpy/llvmpy) recommends to use llvmlite (https://github.com/numba/llvmlite) instead.

See also http://llvmlite.pydata.org/en/latest/user-guide/index.html and in the context of the original article, in particular these two pages:

http://llvmlite.pydata.org/en/latest/user-guide/ir/examples....

http://llvmlite.pydata.org/en/latest/user-guide/binding/exam...

Hope this helps! :-)