Python language problem

[Boris Borcic]

ripleyfu at gmail.com wrote:
>>>> class A:
> ...   pass
> ...
>>>> a = A()
>>>> b = a
>>>> del b
>>>> a
> <__main__.A instance at 0x00B91BC0>
> I want to delete 'a' through 'b', why It does't? 
> How can I do that?

del a,b