1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
#!/usr/bin/env python3
\# -*- coding: utf-8 -*-
\# @Date    : 2018-07-12 23:20:45
\# @Author  : Simon (simon.xie@codewalker.meg)
\# @Link    : http://www.codewalker.me
\# @Version : 1.0.0

class ReverseIterator():
    def \_\_init\_\_(self, str_data):
        self.str\_data = str\_data
        self.index = len(str_data)
    def \_\_iter\_\_(self):
        return self
    def \_\_next\_\_(self):
        if self.index == 0:
            raise StopIteration
        else:
            self.index = self.index - 1
            return self.str_data\[self.index\]
def reservse_genertor(data):
    for index in range(len(data)-1, -1, -1):
        yield data\[index\]


def main():
    example_string = 'simon.xie' 
    ri = ReverseIterator(example_string)
    new\_str\_list = \[\]
    for char in ri:
        new\_str\_list.append(char)
    print(''.join(new\_str\_list))

    other\_str\_list = \[\]
    rg = reservse\_genertor(example\_string)
    for char in rg:
        other\_str\_list.append(char)
    print(''.join(other\_str\_list))

if \_\_name\_\_ == "\_\_main\_\_":
    main()