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what is the difference between commenting and uncommenting the __init__ method in this class?


class CounterList(list):
counter = 0

## def __init__(self, *args):
## super(CounterList, self).__init__(*args)

def __getitem__(self, index):

self.__class__.counter += 1
return super(CounterList, self).__getitem__(index)

On 01/28/2013 09:09 PM, iMath wrote:
> what is the difference between commenting and uncommenting the __init__ method in this class?
>
>
> class CounterList(list):
> counter = 0
>
> ## def __init__(self, *args):
> ## super(CounterList, self).__init__(*args)
>
> def __getitem__(self, index):
>
> self.__class__.counter += 1
> return super(CounterList, self).__getitem__(index)
>

If you don't call the super-class' __init__() method, then the list
won't take anyparameters. So the list will be empty,


--
DaveA

On 01/28/2013 09:09 PM, iMath wrote:
> what is the difference between commenting and uncommenting the __init__ method in this class?
>
>
> class CounterList(list):
> counter = 0
>
> ## def __init__(self, *args):
> ## super(CounterList, self).__init__(*args)
>
> def __getitem__(self, index):
>
> self.__class__.counter += 1
> return super(CounterList, self).__getitem__(index)
>


No difference as this code doesn't do anything else in the __init__() it
overrides. Normally you would add some additional processing there but
if you don't need to, there is no reason to override __init__(),
therefore it's clearer and better to delete those 2 lines.

-m


--
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