python3----基础 用while循环+iter()+next() 实现对字符串的遍历与输出

 my_str = 'hello'
 # for循环
 for v in my_str:
     print(v)
 # while 配合迭代器实现字符串的遍历
 ite = iter(my_str)
 while True:
     try:
         each = next(ite)
     except StopIteration:
         break
     print(each)

 results:
 h
 e
 l
 l
 o
 h
 e
 l
 l
 o