python:list

这篇论文是用TensorFlow写的代码，以下是理解内容记录：

>>> layers_e=[]
>>> layers_e
[]
>>> X=[1,2,3,4,5]
>>> layers_e.append(X)
>>> layers_e
[[1, 2, 3, 4, 5]]
>>> layers_e[-1]
[1, 2, 3, 4, 5]

　　为了更好的理解，进行下面的代码实现：

>>> layers_e = [1,2,3,4,5]
>>> layers_e[0]
1
>>> layers_e[1]
2
>>> layers_e[2]
3
>>> layers_e[3]
4
>>> layers_e[4]
5
>>> layers_e[-1]
5
>>> layers_e[-2]
4
>>> layers_e[-3]
3
>>> layers_e[-4]
2
>>> layers_e[-5]
1