class Growbotics(App): def __init__(self, **kwargs): super(Growbotics, self).__init__(**kwargs) self.settings = [] def build(self): self.root = Widget() self.root = Builder.load_file("growbotics.kv") return self.root def on_start(self): print "START" self.settings = self.root.load_settings() self.root.setup() self.root.connect_to_ROS() def on_stop(self): print "STOP"