another question about classes and subclassing

[Gregory Ewing]

Dave Angel wrote:

> Inside the __init__() method of Submarine, simply call the __init__() 
> method of Craft, with appropriate parameters.

To elaborate on that a little, it looks like this:

   class Craft:

     def __init__(self, position):
       self.position = position


   class Submarine(Craft):

     def __init__(self, position, depth):
       Craft.__init__(self, position)
       self.depth = depth

Note the explicit 'self' passed to the __init__ method
of Craft. This is necessary because you are calling the
method's underlying function directly, bypassing the
magic which normally inserts 'self' automatically.

-- 
Greg