关于python 0基础的20讲的最后一题，取密码的range报错

conn

我现在学习到了《零基础python》20讲，
最后的一个动动手实验：
1. 请用已学过的知识编写程序，找出小甲鱼藏在下边这个长字符串中的密码，密码的埋藏点符合以下规律：
    a) 每位密码为单个小写字母
    b) 每位密码的左右两边均有且只有三个大写字母

（由于我们还没有学习到文件读取方法，大家下载后拷贝过去即可）
请下载字符串文件：

                               
登录/注册后可看大图

string2.txt (8.21 KB, 下载次数: 205)



我的代码

1. str1 = '''ACFlCTLIQlAIVMTqHFkswqbDDHtpgcWaXSSglUYKE
   
2. lqNsYCyaQXBzrFUbkAUAWAKrDgDtAlGMBqWQhpEwquZqWZJpslUfMllCwWptqINjrOBTLuPzwvXNbLCx
   
3. oFRritKRpJgBOaGPZdkUzvYnvYmAlEsVmKRXqyQUOdCBqLYyboOYeAQNLnkuiDXCiNiksSSRpDMVQQgs
   
4. TmYThnppfKSmkpjjceGLaMOvYgsvNkGENKgGtUSzVPlLMeephDKrWGNpAxBqRiCnQIuKwDZurIRsznUp
   
5. xhstMWpHdZzqeEnttlAHiWbhbIJpwKBAGsFWthBiwBDKTFzIUamELZJFLbmqOmwBIYBJIofAUyxTLUEm
   
6. LcOXzjIHFcfUfEWccbWzhVuIZMdTVsOaNsLTpHjrvFaYTnJUrqaYnUmbobfOXXtkjKjFUEhVNlPWeaIY
   
7. uABNuEDKFWiUaqQiBHGsgEmDSKiJKLkkzFWlobXIyUlDzGcwDnEOwwWxgFpebsslmKItazIYctPROSJp
   
8. ImDHusQIkoFQSmuqwdcPNERvflfHtkGTrtbQXqZUsazoxmbVTPIuuxKvfALAaGnIuIZwczCcoIRMncBs
   
9. timFGHPJPaHMPTLjsBjIwbbzKyghaDTUStzJceaYAneywwpvdiUJifPHtXmAwZPChWsDmwonzeeQCEiB
   
10. xWsJLAtrdVEOBxEaYiSabHdUwlXlDOAKzZUwozJoBGvnFttDkXdYdjQSzzhTIPfYpWVFdiFIqSbyPZIi
    
11. VoXunBPbAJVMWluPcIfHmjPeHaTyClCvTOucEYEZXbVDiZMsfeuruDGMmQEsHutzvzVmWvCoPRguBiHh
    
12. taTeaguPmNuAxzYJLEcdoApfIFBaLUqettjTJNlHZYlJZRRoKXEvFnoUHdPjDuXuTAubGODkHAokpItw
    
13. SlEwhjrUSlfMawWlTMciWAzVcgPcqCHIaogokYAWGsvWZzBfJqzxIkCNvHDvBkOMCyeYXzVVuRJLQIOy
    
14. BMoVPgFLOagDxyPfWxTtZQNCLOrVVclPzMNYruNUyMOBKxBvinxuGMAAfndhPsROtkOJAAJQSxpmTzXm
    
15. CmEwZOhlItvETUneqvdKLghLyREjuJWRFjVVuNMiPuvvmRaEUmjCXDVuMRAvBuHUYGKPXthWISIbueRp
    
16. uvxpmqclmrXpAGFrxhJGxQwlrbkHEmcEUooCoPqGzbrCfIWmtUKmzzXvcqbhxKcAwXCNjbJDWDndKiLK
    
17. HwaFKyhXJQgHjIaTfIJrkhUpTHJZebRertDigQtDKxGerMRgHWFTrqqZlcBjAUfTZdFlZCAEZnhzgTIy
    
18. gJSsWJjFcCVoFonAfKPTOhTxjxTRtzSKLoIOScEwBCDvWFDVGpBOpijqdwvugoYsyuIOZJTcySDrzy
    
19. wBxediHOIYgasrUIDsNZcParqTGfTaBZHoSssXGtiCVvLReyoiitzMpsouqUeMHGWwDMgBaQTRkxPwNP
    
20. XsvyFVXfjgKuamMTsEsbeKDgAdVndyDleenPBcXWKGPcDsALDajkCEGufvbtyXUZnelqISbQnHphDoTH
    
21. RMIxMKclpWSvQHkzRhdAehBVaKYaXRPMpGaeRxvTRVFfewirvIDoGvYTAvKSoMFCLUNVFVKrYMeYtBrS
    
22. KgiBOjvliNOHLrmztypGhQjtpEQwzVfpVqsTUPvOCPzgqOuvLXJBQZHLmSwGTxEMgCAbogXombCiBDNX
    
23. BvGtXjrGWbWHtNCoRuqIZPhBQXZiNUhbmzOiyByAoMSBvusppiPVibIqmLXwXEVfcEAyNeUxaEZThULu
    
24. mkGmoLrpOEktwRluXvOmmfEWxZkxUNIqZKuzbaUmLKBYrXMmdOYLEzljzbSJnqRbSiAFyUNyyieKITkh
    
25. mvkKyosXKCaTsXQIKczJmxuqIEKeGGGwZyWTolQynlWngjDzFMlwhJFEmODeycbEfxgSRbIXySfwlhZZ
    
26. BUBhKyGBHRzWGRXAzarcmSDORvaOMOqYlcVIMwlHGtrLMhFWioqeKfvsJdTXmfQzavzSzCRrVzLFMaBT
    
27. DMOPFJcjzXcPvBkzacRmVKTQAvVobGRBypFHvoUdjvBhwWXVdDjvfJOocyIHbMqZGMaRaaFFnmtvTSkY
    
28. nIHbmPAtuEszMDFURBYxcOJXKMvJbfSbhiaacxhxiZBnoHTcFeqXQfjTqpcMKFpvvzkpSxlDxSlhikFZ
    
29. XSplcknpxiZfwUwGsrfpBUkevEiwndkKrVpWKufWpLTWXcyyXehOcDfnzgTAkhwOAcaiHqJWzsuAvMyD
    
30. pDJgeCdAJMwatRfcpKQGTkwxHracsYOlZeXoGthHIRfDBYzhuGEQRKFRnqSEbWDCJObWSAoSwFzVZEnI
    
31. rVBwXibUaTwnSTwRmIwkIgoGPRiOMLOTvnzEBBCfcugYZwGSsHRKCJoRsxxzRkKwnTRcRNfbMGssqmXV
    
32. '''
    
33. list1 = []
    
34. list2 = []
    
35. str2 = ''
    
36. for each in str1:
    
37.     if each != "\n":
    
38.         list1.append(each)
    
39. #print ('1for')
    
40. #print (list(range(len(list1))))
    
41. for i in list(range(len(list1))):
    
42.     while list1[i].islower():
    
43.         #print ('while',i)
    
44.         if ((list1[i-3].isupper() and list1[i-2].isupper() and list1[i-1].isupper()) and (list1[i+3].isupper() and list1[i+2].isupper() and list1[i+1].isupper())) == True:
    
45.             list2.append(list1[i])
    
46.             #print ('IF')
    
47.             break
    
48.         else:
    
49.             break
    
50. 
    
51. print (list2)
    
52. #print (list(range(len(list2))))
    
53. for i in list(range(len(list2))):
    
54.     str2 = str2 + list2[i]
    
55. print ('密码是：'+ str2)
    
56.    
    

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报错信息：

1. >>>
   
2. Traceback (most recent call last):
   
3.   File "C:\Users\Administrator\Desktop\SS.py", line 96, in <module>
   
4.     if ((list1[i-3].isupper() and list1[i-2].isupper() and list1[i-1].isupper()) and (list1[i+3].isupper() and list1[i+2].isupper() and list1[i+1].isupper())) == True:
   
5. IndexError: list index out of range

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如果我在string2中取一半的数据就不报错：

1. >>> ================================ RESTART ================================
   
2. >>>
   
3. ['l', 'l', 'p', 'u', 'i', 'a', 'l', 'l', 'o', 'u', 'o', 'v', 'v', 'h', 'e', 'z', 'a', 'f', 'b', 'i']
   
4. 密码是：llpuiallouovvhezafbi
   
5. >>>

复制代码

请教大神指点。

wei_Y

小甲鱼老师翻译正则了，直接上正则匹配吧。
看报错是超过列表长度了，具体哪一步自己测测吧。

dothink

if (password[1]).islower():
  6         flag_a=(password[i-1]).isupper()
  7         flag_b=(password[i+1]).isupper()
  8         flag_c=(password[i+2]).isupper()
  9         if flag_a+flag_b+flag_c==3:
10                 ls.append(password[1])

wanderkaka

条件已经错了，前面第4个字符也不能是大写字母

wanderkaka

>>> re.findall(r'[a-z][A-Z]{3}([a-z])[A-Z]{3}[a-z]',str1)
['i', 'l', 'o', 'v', 'e', 'f', 'i', 's', 'h', 'c']

wanderkaka

第四个字符要小写才对的

小伟xd

length = len(str1)

for each in range(length-2):
    if str1[each] == '\n':
        continue
    if str1[each].islower():
        flag_a =( str1[each-3]).isupper()
        flag_b =( str1[each-2]).isupper()
        flag_c = (str1[each-1]).isupper()
        flag_d = (str1[each+1]).isupper()
        flag_e = (str1[each+2]).isupper()
        flag_f = (str1[each+3]).isupper()
        flag_h = (str1[each+4]).islower()
        flag_k = (str1[each-4]).islower()
        if ((flag_a+flag_b+flag_d+flag_e+flag_f+flag_c+flag_h+flag_k)==8):
            print(str1[each],end = '')