[已解决]求助！第20讲动手1，求大佬帮忙找出问题，谢谢！！

Mmyw

str1 = '''ACFlCTLIQlAIVMTqHFkswqbDDHtpgcWaXSSglUYKE
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ixDDoCDOOeAqvQJFxLWDICfGmufyxmaMshbvcrtjqqVtffZTnbtCOQfzRMGwOQEKaAmSWjnYdNgvdkmd
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qKWGc'''



i = 3
length = len(str1)
while i < length - 4 :
    before = str1[i-3] + str1[i-2] + str1[i-1]
    last = str1[i+1] + str1[i+2] + str1[i+3]
    if str1[i].islower() :
        if before.isupper():
            if str1[i-4].islower() :
                if last.isupper() :
                    if str1[i+4].islower() :
                        print(str1[i],end = '')
                        i += 1
                    else :
                        i += 1
                else:
                    i += 1
            else :
                i += 1
        else :
            i += 1
    else :
        i += 1
#结果为：uilovefisdhc，多了两个字母（u和d），不明白问题出在哪里了，求大佬指出！！

最佳答案

月排行榜 / 总排行榜

zltzlt

2019-8-8 08:03:11

分开检测就可以了

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. IKYzyWHIsCjdzxiHEtvHaufVgcoqVkqIQertevTUTIVMYlNXCGEUzQowqsFpciURKoUwqCRogxeghOWs
    
33. cMnuAathgFvNIVqqXpmdJDJPhXQpZCyNbTYktMyTUtQEBeQBhEZzqHotmYREADhFodlcPmTMutBZyefW
    
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104. qKWGc'''
     
105. 
     
106. 
     
107. 
     
108. i = 3
     
109. length = len(str1)
     
110. while i < length - 4 :
     
111.     if str1[i].islower() :
     
112.         if str1[i + 1].isupper() and str1[i + 2].isupper() and str1[i + 3].isupper():
     
113.             if str1[i-4].islower() :
     
114.                 if str1[i - 1].isupper() and str1[i - 2].isupper() and str1[i - 3].isupper() :
     
115.                     if str1[i+4].islower() :
     
116.                         print(str1[i],end = '')
     
117.                         i += 1
     
118.                     else :
     
119.                         i += 1
     
120.                 else:
     
121.                     i += 1
     
122.             else :
     
123.                 i += 1
     
124.         else :
     
125.             i += 1
     
126.     else :
     
127.         i += 1

复制代码

跳转到最佳答案楼层

zltzlt

分开检测就可以了

1. str1 = '''ACFlCTLIQlAIVMTqHFkswqbDDHtpgcWaXSSglUYKE
   
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104. qKWGc'''
     
105. 
     
106. 
     
107. 
     
108. i = 3
     
109. length = len(str1)
     
110. while i < length - 4 :
     
111.     if str1[i].islower() :
     
112.         if str1[i + 1].isupper() and str1[i + 2].isupper() and str1[i + 3].isupper():
     
113.             if str1[i-4].islower() :
     
114.                 if str1[i - 1].isupper() and str1[i - 2].isupper() and str1[i - 3].isupper() :
     
115.                     if str1[i+4].islower() :
     
116.                         print(str1[i],end = '')
     
117.                         i += 1
     
118.                     else :
     
119.                         i += 1
     
120.                 else:
     
121.                     i += 1
     
122.             else :
     
123.                 i += 1
     
124.         else :
     
125.             i += 1
     
126.     else :
     
127.         i += 1

复制代码

geen

这个问题之前有鱼油问过了，戳链接： https://fishc.com.cn/thread-121572-1-1.html


主要是换行符 \n 的问题，
用SHELL检验下，的确也如此：
>>> str1 [/url]= 'AA\nA'
>>> print(str1[0:3].isupper())
True
>>> print(str1[0:2].isupper())
True
>>> len(str1)
4
>>>

Mmyw

geen 发表于 2019-8-8 09:58
这个问题之前有鱼油问过了，戳链接： https://fishc.com.cn/thread-121572-1-1.html

谢谢！

zltzlt

@不二如是

shenshuai

zltzlt 发表于 2019-8-8 08:03
分开检测就可以了

你好版主，我看了这个代码之后有些不理解。

1. i = 3 #这里为什么要=3？为什么不是从0开始？
   
2. length = len(str1)
   
3. while i < length - 4 :#这里为什么要length - 4？
   
4.     if str1[i].islower() :
   
5.         if str1[i + 1].isupper() and str1[i + 2].isupper() and str1[i + 3].isupper():
   
6.             if str1[i-4].islower() :
   
7.                 if str1[i - 1].isupper() and str1[i - 2].isupper() and str1[i - 3].isupper() :
   
8.                     if str1[i+4].islower() : #这里+4又是为什么呀？
   
9.                         print(str1[i],end = '')
   
10.                         i += 1
    
11.                     else :
    
12.                         i += 1
    
13.                 else:
    
14.                     i += 1
    
15.             else :
    
16.                 i += 1
    
17.         else :
    
18.             i += 1
    
19.     else :
    
20.         i += 1

复制代码