>>> from heapq import merge >>> def kmerge(*lists): ... return merge(*map(sorted, lists)) ... >>> list(kmerge([1,2,3],[6,5,4],[2,2])) [1,

>>> from heapq import merge >>> def kmerge(*lists): ... return merge(*map(sorted, lists)) ... >>> list(kmerge([1,2,3],[6,5,4],[2,2])) [1, 2, 2, 2, 3, 4, 5, 6]