refering to base classes

[Chaz Ginger]

Jason wrote:
> Chaz Ginger wrote:
>> Chaz Ginger wrote:
>>> glenn wrote:
>>>> hi - Im quite new to python, wondering if anyone can help me understand
>>>> something about inheritance here. In this trivial example, how could I
>>>> modify the voice method of 'dog' to  call the base class 'creatures'
>>>> voice method from with in it?
>>>>
>>>> class creature:
>>>>     def __init__(self):
>>>>         self.noise=""
>>>>     def voice(self):
>>>>         return "voice:" + self.noise
>>>>
>>>> class dog(creature):
>>>>     def __init__(self):
>>>>         self.noise="bark"
>>>>
>>>>     def voice(self):
>>>>             print "brace your self:"
>> I did forget to mention that in 'dog"s' __init__ you had better call
>> creature's __init__. You might make it look like this:
>>
>> def __init__(self):
>> 	self.noise = 'bark'
>> 	creature.__init__(self)
>>
> 
> There's a problem with Chaz's __init__() method.  Notice that the
> creature class's __init__ sets self.noise to the empty string.  In this
> case, the superclass's __init__() method should be called first:
> 
> class dog(creature):
>     def __init__(self):
>         creature.__init__(self)
>         self.noise = "bark"
>     def voice(self):
>         print "brace your self:"
>         creature.voice(self)
> 
>   --Jason
> 
Very true....I was showing him in "spirit only"...lol.


Chaz.