The Xcode 4 project template and file template for Python
Python
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Python 2.xctemplate
Python 3.xctemplate
README

README

This project try to simplify the steps to add Python to Xcode 4.

For Xcode 4.3 or later, copy the Python 2 and Python 3 directories to "Path/To/Xcode/Contents/Developer/Library/Xcode/Templates/Project Templates/Mac/Others/"; for 4.2 and earlier, copy to "/Developer/Library/Xcode/Templates/Project Templates/Mac/Others/", then you can new a python project with Xcode.

The only thing you need to configure it manually is the Scheme. You can refer the readme.txt in your new python project to done it. 

If you want to know more about this project,  https://docs.google.com/document/pub?id=1zhMB9D3wm6BXpWMlRZA-J66-Z_tkACAqYdTzZkQ4iys  would be a good start.