Cacher is the code snippet organizer for pro developers

arr = [[4, 3, 2], [3, 3, 3], [2, 3, 1], [1, 1, 1], [1, 2, 3], [2, 2, 2], [3, 4, 1]]
print arr

s = sorted(arr, key=lambda x : (x[0], x[1], x[2]))

print s