Use PythonLauncher to create a Python file that you can double-click on in MacOSX. i.e.

• Open Finder
• Select File
• Apple I (or right click and choose Open With)
• Find PythonLauncher (/System/Library/Frameworks/Python.framework/Versions/2.3/Resources/PythonLauncher.app
  )
• Choose Always Open With

There you have it…