Python生成多维双元素列表

import numpy as np
a = [ ]
for i in range(6):
  for j in range(6):
      a0 = [ i,  j]
      a.append(a0)

b = np.array(a)

执行结果：

b
Out[3]: 
array([[0, 0],
       [0, 1],
       [0, 2],
       [0, 3],
       [0, 4],
       [0, 5],
       [1, 0],
       [1, 1],
       [1, 2],
       [1, 3],
       [1, 4],
       [1, 5],
       [2, 0],
       [2, 1],
       [2, 2],
       [2, 3],
       [2, 4],
       [2, 5],
       [3, 0],
       [3, 1],
       [3, 2],
       [3, 3],
       [3, 4],
       [3, 5],
       [4, 0],
       [4, 1],
       [4, 2],
       [4, 3],
       [4, 4],
       [4, 5],
       [5, 0],
       [5, 1],
       [5, 2],
       [5, 3],
       [5, 4],
       [5, 5]])