join 

li = ["alex","WuSir","ritian","barry","wenzhou"]
s = "_".join(li)
print(s)

结果：
    alex_WuSir_ritian_barry_wenzhou
posted @ 2019-05-28 13:50  冰灬荷  阅读(71)  评论(0)  编辑  收藏  举报