[Tutor] Class - superclass

[Bernard Lebel]

Hello,

I'm experimenting with basic inheritance concepts, and something that
I would assume to work returns an error.


>>> class A:
...     def __init__( self ):
...             self.a = 13
...
>>> class B( A ): # create sub-class of class A
...     def __init__( self ):
...             self.b = 14
...
>>>
>>>
>>>
>>> b = B() # create instance of class B
>>> b.a # here I would expect the class A's a attibute to be accessible...
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: B instance has no attribute 'a'



Anyone can shed any light on this? Using Python 2.3.4.


Thanks
Bernard