'****'wildcards are allowed. When a matching AppleEvent is received the parameters are decoded and your callback is invoked.
_typeare the Class and Type designators and
_attributesis a dictionary with the AppleEvent attributes.
The return value of your method is packed with aetools.packevent() and sent as reply.
Note that there are some serious problems with the current design. AppleEvents which have non-identifier 4-character designators for arguments are not implementable, and it is not possible to return an error to the originator. This will be addressed in a future release.