class View:
    self._controller = controller
    self.actions = {'a': self._controller.method1,
                    'b': self._controller.method2,
                     ...}

def main_cycle(self):
    ...
    ...
        while not self._model.stop_cycle():
            action = self._view.request_action()
            try:
                self._view.actions[action]()
            except KeyError:
                self._view.show_error_input()

class View:
    ...
    ...
    def view_component(self):
        param1 = input('Enter param1')
        return param1