田晨丿ggss

# !/usr/bin/env python # -*- coding: utf-8 -*- str = input("请输入字符串") def max_str_len(str): # 取出字符串长度 lenght =len(str) # 用于存放不重复字符 list = [] # 判断字符串是不是空 if lenght==0: return 0 else: num = 1 for i in range

1、int型 a = a+b b = a-b a = a-b 2、python方法 a,b = b,a 3、位运算 a=a^b; b=a^b; a=a^b;

python # !/usr/bin/env python # -*- coding: utf-8 -*- str = "abc" rts = "" for i in str: rts = i + rts print(rts)