6.4. Summary

We’ve added five new commands to MultiDoc; now it can be used for the purposes for which it was created: reading, saving, and creating multipage documents. There are other features that might be nice, but none of them should be too difficult to add. The point of the structure we chose for MultiDoc is that it should be relatively easy to work out where in the code any changes should go. For example, if you want to save the currently selected tab in the document, you need to add something to the model to represent it. You also need to update the selection on the model when it changes in the view (the job of the tab controller) and so on. Correspondingly, when you’re tracking down bugs or problems, you should have a good idea of where to start looking.

We hope that, through MultiDoc, you’ve seen how easy it is to refactor well-structured Python code to include new features. Particularly useful is the ability to experiment with .NET classes using the interactive interpreter. You can also make minor speculative changes to your code and run it immediately with no need for a compile phase.