for循环每次取出一个字符（不是字节）

python3.5 for循环每次取出一个字符（不是字节）

#!/usr/bin/env python
# -*- coding:utf-8 -*-
 
my_str = "我是哈哈"
for i in my_str:
    my_bytes = bytes(i, 'utf-8')
    print(my_bytes)
    my_bytes = bytes(i, 'gbk')
    print(my_bytes)
 
for i in my_str:
    my_bytes = bytes(i, 'utf-8')
    for b in my_bytes:
        print(hex(b))
        print(bin(b))
        print(oct(b))
        print(b)