Inheritance with Kivy

## This is the controller.kv file

#:kivy 1.0

<MyContainer>:
    Button:
        text: 'My controller info is: '

<Controller>:


## And this is the main.py file

import kivy
kivy.require('1.0.5')

from kivy.uix.floatlayout import FloatLayout
from kivy.uix.boxlayout import BoxLayout
from kivy.app import App

class MyContainer(BoxLayout):

    def do_action(self):
        print "hi!"

class Controller(MyContainer):
    def __init__(self, **kwargs):
        self.do_action()
        super(Controller, self).__init__(**kwargs)

class ControllerApp(App):

    def build(self):
        return Controller()

if __name__ == '__main__':
    ControllerApp().run()