class BaseHandler:
    def __init__(self):
        setup()
        try:
            handle()
        finally:
            finish()

    def setup(self):
        pass

    def handle(self):
        pass

    def finish(self):
        pass

class MessageHandler(socketserver.BaseRequestHandler):
    def handle(self):
        with pickle.loads(self.request.recv(1024)) as message:
            pass

class ChildMessageHandler(socketserver.BaseRequestHandler):
    def handle(self):
        print(message)