flip_horizontal_axis_list.py

from collections import deque

def compare(a, b):
  return -1

def sort_horizontal_axis(matrix):
  result = sorted(matrix, lambda a,b : -1)
  return result

def sort_horizontal_axis_lambda(matrix):
  matrix.sort(lambda a,b : -1)
  # complexity O(n)
  # space O(1)
  return matrix

def flip_horizontal_axis(matrix):
  result = deque(matrix)
  result.reverse()
  return list(result)

print(flip_horizontal_axis(
  [[1,2,3],[4,5,6],[7,8,9]]
))

print(sort_horizontal_axis(
  [[1,2,3],[4,5,6],[7,8,9]]
))

print(sort_horizontal_axis(
  [[1,1,1],[2,2,2],[3,3,3]]
))