> Are you saying, the error message it spits out,
>>
> AttributeError: 'int' object has no attribute 'list',
> is misleading? 
>

As I see it the problem is that the sum runs over (0..n-1).
Thus for n = 0 it returns by convention the integer 0 for the
empty sum (is this correct?) which of course has no list.

But shouldn't it return the null polynomial in this case? 
And isn't the null polynomial represented by the empty list? 

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