join（添加字符）与id显示 

1 #!/usr/bin/env python
2 li = ["alex",'sb']
3 l1 = "_".join(li)
4 print(l1)
5 print(id(li))

 

posted @ 2016-12-23 17:44  失落的黎明  阅读(361)  评论(0)    收藏  举报