jesus, now i fixed it, using odd lambda sort. l.sort(lambda x,y: cmp(len(x), len(y))) print l
BUT I AM STILL CONFUSED WHY COSTOMIZED SORT FAILED TO SORT AS IT IS PROGRAMMER! thinke365 wrote: > > i mean the output i want is: > [ [1, 2], [1, 2, 3, 4], [1, 2, 3, 4, 5]], that is sort according to the > length of the list element > > thinke365 wrote: >> >> l = list() >> l1 = list((1, 2, 3, 4)) >> l2 = list((1,2)) >> l3 = list((1, 2, 3, 4, 5)) >> l.append(l1) >> l.append(l2) >> l.append(l3) >> print l >> >> def sort_by_list(E1, E2): >> print len(E1), len(E2) >> return len(list(E1)) > len(list(E2)) >> >> l.sort(cmp=sort_by_list) >> print l >> >> output: >> [[1, 2, 3, 4], [1, 2], [1, 2, 3, 4, 5]] >> 2 4 >> 5 2 >> [[1, 2, 3, 4], [1, 2], [1, 2, 3, 4, 5]] >> >> the order of the elements in the list did not change! >> > > -- View this message in context: http://old.nabble.com/this-customize-sort-did-not-work-%2Cwhat%27s-wrong--tp27289860p27290014.html Sent from the Python - python-list mailing list archive at Nabble.com. -- http://mail.python.org/mailman/listinfo/python-list
