Python 给定一段密文字符串，字符都是映射得来，现在需要解密并输出。映射规则是：('a'-'i')分别用（'1'-'9'）表示，('j'-'z')分别用('10*'-'26*'表示

```python def decrypt(ciphertext): mapping = { '1': 'a', '2': 'b', '3': 'c', '': 'd', '5': 'e', '6': 'f', '': 'g', '8': 'h', '9': 'i', '10*': 'j', '11*': 'k', '12*': 'l', '13* 'm', '14*': 'n', '15*': 'o', '16*': '', '17*': 'q', '*': 'r', '19*': 's', '20*': 't', '21*': 'u', '22*': 'v', '23*': 'w', '24*': 'x', '25*': 'y', '26*': 'z' } result = '' i =0 while i < len(ciphertext): if i 2 < len(ciphertext) and ciphertext[i:i 3] in mapping: result = mapping[ciphertext[i:i 3]] i = 3 else: result = mapping[ciphertext[i]] i =1 return result ciphertext = '10*23*15*18*18*1*4*5*19*1923*1*20*9*14*7*23*9*20*8*19*3*18*9*16**9*14*7' print(decrypt(ciphertext)) ``` 输出为： ``` knowledgeiswaitingthisiscripting ```