#NEWLINE# def __init__( self , label = '' , is_pressed = False , on_press = None ) : #NEWLINE# #INDENT# TwoStateController . __init__ ( self , is_pressed = is_pressed , on_press = on_press ) #NEWLINE# Viewer . __init__ ( self ) #NEWLINE# self . label = label #NEWLINE# self . _label = None #NEWLINE# self . _button = None