On Apr 30, 8:57 pm, n00m <n... at narod.ru> wrote: > >>> a = ['zzz', 'aaa'] > >>> id(a[0]), id(a[1]) > > (12258848, 12259296)>>> a.sort() > >>> id(a[0]), id(a[1]) > > (12259296, 12258848) > > That proves you know nothing, that is a list operation, not a string operation.