decouple copy of a list

[Jean-Michel Pichavant]

cassiope wrote:
>> Alternatively, you can write
>>
>> import copy
>> a = [1,2,3]
>> b = a.copy()
>>
>>
>> JM
>>     
>
> I'm not a pyguru, but... you didn't use copy quite right.
> Try instead: b= copy.copy(a)
>
>   
You're right, you're not a python guru so don't even try to contradict 
me ever again.

...

:D of course I did it completly wrong.  I don't know what happened in my 
brain at that time, maybe nothing and that's the point.

JM