[Tutor] OOD - Another class question

[C.T. Matsumoto]

James Reynolds wrote:
> I have another question related to OOD. What I have is a module with 
> one parent class and two child classes. Some stuff is done to the 
> object that is passed to the function in one of the child classes and 
> this then calls a function from the global class passing local 
> variables (from the child class).
>
> When I do this, I am told: AttributeError: 'HillBuilder' object has no 
> attribute 'MountainBuilder'
>
> The question is, what am I doing wrong?
>
> Here is an example:
>
> class MountainBuilder(object):
> def __init__(self, mountain):
>             self.mountain = mountain
>             self.mountain_func
>            self.pinetree_func
>
>
>       def pinetree_func(self, knoll)
>             do stuff to knoll
>             return knoll
>
>
>       def mountain_func(self, hill)
>             knoll = hill * 2
>             pinetree = pintree_func(knoll)
>             return hill
>
>
> class HillBuilder(MountainBuilder):
> def __init__(self, mountain):
>               OptionLoad.__init__(self, mountain)
>               self.MountainBuilder.mountain_func
>               self.hill_func
>
>
>       def hill_func(self)
>             hill= do stuff to self.mountain
>             grassyknoll = MountainBuilder.mountain_func(hill)
>             
>             return grassy knoll
>
>
> do stuff with grassy knoll
>
> ------------------------------------------------------------------------
>
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>   
The line grassyknoll = MountainBuilder.mountain ...

Since you inherit MountainBuilder you call the mountain_func (which is a 
method :-) ) with self:
grassyknoll = self.mountain_func(hill)

All methods inside the MountainBuilder can be called as if they are a 
part of the HillBuilder (thus inheritance).

Cheers,

T