Python list嵌套 三维数组

cores_multicast = [[] for i in xrange(64)]
temp_list = [0, 1]
temp_list2 = [0, 3]
cores_multicast[0].append(temp_list)
cores_multicast[0].append(temp_list2)
print cores_multicast
print cores_multicast[0]
print cores_multicast[0][0]
print cores_multicast[0][0][0]
print cores_multicast[0][0][1]

>>> ================================ RESTART ================================
>>> 
[[[0, 1], [0, 3]], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], []]
[[0, 1], [0, 3]]
[0, 1]
0
1