beyond_class.py

class Keyboad():
    def __init__(self):
        self.conf1 = 100
        self.keymap = []
        self.extensions  = []    
    def find_key(self, row, col):
        return self.keymap[row][col]
    
    

class Extension():
    def __init__(self):
        self.param1 = 100
        self.param2 = 200
        
    def setParam1(self, val):
        self.param1 = val
        
    def getParam1(self):
        return self.param1
    
    def getSuperKeymap(self):
        # Keymapほしい
        pass
    
    
    
kbd = Keyboad()

my_ext = Extension()

kbd.extensions = [my_ext]

keymap = [[1,2,3],[4,5,6]]
kbd.keymap = keymap