On Thu, 04 Oct 2012 01:58:16 +0000, Steven D'Aprano wrote: > adict: 24712 > alist: 23127324 [...] > So in this situation, a list of lists uses about 100 times > more memory than a dict, but look-ups are about 6% faster. Correction: about 1000 times more memory. Sorry for the typo. -- Steven