Python 索引错误字符串

Question

我似乎遇到了以下错误 -

IndexError                                Traceback (most recent call last)
<ipython-input-46-582a33edccfc> in <module>()
 10         string = alphabet[i] + string
 11     return string
 ---> 12 ptext=number2string(int(dec))
 13 print ptext

 <ipython-input-46-582a33edccfc> in number2string(M)
  8         i = M % Integer(100)
  9         M = (M-i)/Integer(100)
 ---> 10         string = alphabet[i] + string
 11     return string
 12 ptext=number2string(int(dec))

 IndexError: string index out of range

对于以下代码 -

n = 80590779575522264848081505402281132333075026055511
d = 5096598073523319979793354769252907316734417084656927459986239265286821982150579957763648301138598311
cipher= 60411283179665957400593484939411104457866145531782
dec = pow(cipher,d,n)
print dec
alphabet='0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz ,.?!:;-\'\"'
def string2number(string):
   M=0
   for i in range(len(string)):
       M = 100*M + alphabet.index(string[i])
   return M
def number2string(M):
    string=''
    while M > 0:
        i = M % 100
        M = (M-i)/100
        string = alphabet[i] + string
    return string
ptext=number2string(int(dec))
print ptext

我正在尝试执行 RSA 加密和解密。该代码之前运行良好。这只是我孤立的摘录。我知道还有其他类似的问题，但我无法通过这些解决方案解决这个问题。

Answer 1

基本上，当您执行 %100 时，它会获取显示错误的最后 2 位数字，因此请将 i = M % 100 & M = (M-i)/100 替换为 i = M % 10 & M = (M-i)/10

输出：

5351520757559142628218193819530718324607905389694 5351520757559142628218193819530718324607905389694

Python 索引错误字符串

Python index error string

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rsa

sage