1string.join(str)分割字符串,用string把str字符串分割开,并且返回产生的新字符串。
In [1]: str = "abcdefg" In [2]: ",".join(str) Out[2]: 'a,b,c,d,e,f,g'
2连接列表、元祖、字典(字典里连接的是key)里的字符串元素(这里必须是字符串元素,其他类型会报错),返回一个字符串。
In [3]: dict = {"a":"1","b":"2","c":"3"} In [4]: "+".join(dict) Out[4]: 'a+b+c' In [5]: list = ["a","b","c"] In [6]: "+".join(list) Out[6]: 'a+b+c' In [7]: tup =("a","b","c") In [8]: "+".join(tup) Out[8]: 'a+b+c'