Why is this?

[Paolino]

Paolino wrote:
> Jiri Barton wrote:
> 
>>Hi everyone,
>>
>>I have a problem with initialization.
>>
>>
>>>>>a, b = [[]]*2
>>>>>a.append(1)
>>>>>b
>>
>>[1]
>>
>>Why is this? Why does not this behave like the below:
>>
> 
>  >>> a, b = [[]]*2
>  >>> a==b
> True
Ooops I should write 'a is b'
> 
> 
>>And, just to add to my confusion:
>>
>>
>>
>>>>>[[]]*2
>>
>>[[], []]
>>
>>
>>>>>[[], []] == [[]]*2
>>
>>True
> 
> This confuses me also,looks like empty lists share same object.
This is actually OK as lists are compared for their contents ;-)

> Paolino
> 
> 
> 	
> 
> 	
> 		
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