We’ll see how to examine Mail’s private API, load a plugin into Mail, and use that plugin to extend Mail’s behavior. This tutorial uses PyObjC, the
Python<->Objective-C bridge. You could just as easily use Objective-C, but I prefer to work in Python. The PyObjC folks have done a wonderful job and deserve a lot of credit. Just remember that an Objective-C message of the form
doSomethingWithAnObject: obj1 andAnother: obj2 gets translated into PyObjC as
doSomethingWithAnObject_andAnother_(obj1, obj2) There should be one underscore for each colon. Otherwise, it’s pretty much the same as in Objective-C.
