On Monday 14 November 2011, Rani Hod wrote:
> Dear Abby,
>
> Any idea why sorted and list.sort behave differently in the following
> example?
> (specifically, why x is not sorted in the end?)
>
> Thanks,
> R.
>
> ------------8<--------------------8<--------
>
> >>> x = ['one','two','three']; x.append(x)
> >>> sorted(x, key=len)
>
> ['one', 'two', ['one', 'two', 'three', [...]], 'three']
>
> >>> x.sort(key=len); x
>
> [[...], 'one', 'two', 'three']
> ------------8<--------------------8<--------
As a hint, consider that a truly sorted x is
['one','two',['one','two',[...],'three'],'three']
Consider how that is different from sorted()'s output.
HTH,
Shai.
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