Python 列表嵌套多种实现方式

 

 list 中 套着 list

l = [[1,2],[3,4],[[5,6],[7,8]]] # 如何打印输出字符 5

print(l[2][0][0])			# 该如何理解呢？

 

 

去掉外层的嵌套

xx = [[1],[2]]

yy= [i[0] for i in xx]

print(xx)

print(yy)

 

 

REF

https://www.cnblogs.com/sexyboy/p/8510141.html

https://blog.csdn.net/weixin_42250835/article/details/86698139?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromBaidu-2.not_use_machine_learn_pai&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromBaidu-2.not_use_machine_learn_pai

http://www.voidcn.com/article/p-zijkotyk-bz.html