python实现顺时针打印矩阵

# coding:utf-8

class Solution(object):
  def printMatrix(self, matrix):
    # 打印矩阵
    result = []
    while matrix:
      result += matrix.pop(0)
      if matrix:
        matrix = self.rotate(matrix)
    return result

  def rotate(self, matrix):
    # 逆时针旋转矩阵
    row = len(matrix)
    col = len(matrix[0])
    # 存放旋转后的矩阵
    new_matrix = []
    # 行列调换
    for i in range(col):
      new_line = []
      for j in range(row):
        new_line.append(matrix[j][col-1-i])
      new_matrix.append(new_line)
    return new_matrix

if __name__ == '__main__':
  # 测试代码
  matrix = [
    [1,2,3,4],
    [5,6,7,8],
    [9,10,11,12],
    [13,14,15,16]
  ]
  solution = Solution()
  result = solution.printMatrix(matrix)
  print(result)