1. set也是一组数,无序,内容又不能重复,通过调用set()方法创建
2.例子
s = "233333" print(s) a = set(list(s)) print(a) a = ''.join(a) print(a)
输出
a = "233333" a_1 = "" for i in a: if i not in a_1: a_1 += i print(a_1)
输出: