ObjP's goal is to create a two-way bridge between Python and Objective-C. Unlike PyObjC, which uses dynamic calls to methods on runtime, ObjP generates static code. It generates either Objective-C interfaces to Python code or Python modules to interface Objective-C code.
At the moment, the library is exceedingly rudimentary, but it works for simple cases. One of these cases is in demos/simple. To build and run this demo do (Python 3.2+ required. Also, the "objp" folder needs to be in your PYTHONPATH):
$ ./waf configure build $ cd build $ ./HelloWorld
That programs calls a simple Python script from Objective-C, and that python script itself calls an Objective-C class.