PyObjC

PyObjC enables bidirectional communication between the programming languages Python and Objective-C . Thus, a Python programmer can access the functional scope of the Objective-C toolkits, and Objective-C programmer can access that of Python.

PyObjC is often used to program Cocoa - GUI applications on Mac OS X in Python. PyObjC can also be used to access other APIs such as Foundation, AppKit, Address Book, Bonjour and NetInfo.