title: Open specific file type with Python script?
body: <p>How can I make a Python script to be a specific file type's (e.g., *.foo) default application? As in, when I double click the file in the Finder / Explorer I want the file to open in the Python script.</p>
  
  <p>Is this possible to do in Win and/or OS X? The application is a PySide app if that matters.</p>