19         print('A after', ev.keyname, self)

    19         print('A after', ev.keyname, self)

    20 

    20 

    21 

    21 

    22 class B(A):

    22 class B(A):

    23     def __init__(self):

    23     def __init__(self):

    25 

    25 

    26     def on_keypress(self, ev):

    26     def on_keypress(self, ev):

    27         """B"""

    27         """B"""

    28         print('B on', ev.keyname, self)

    28         print('B on', ev.keyname, self)

    29         #return True

    29         #return True

    33         print('B after', ev.keyname, self)

    33         print('B after', ev.keyname, self)

    34 

    34 

    35 

    35 

    36 class C(B):

    36 class C(B):

    37     def __init__(self):

    37     def __init__(self):

    39 

    39 

    40 

    40 

    41 def on_keypress(ev):

    41 def on_keypress(ev):

    42     """global"""

    42     """global"""

    43     print('global on', ev.keyname)

    43     print('global on', ev.keyname)