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[已解决]python基础入门练习题

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发表于 2017-7-9 19:38:20 | 显示全部楼层 |阅读模式

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python零基础入门20课时中的动手做做,问题是
找出藏在长字符串中的密码,密码的埋藏点符合下规律:
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

我按照课后参考答案打的如下代码:
str1 = '''ACFlCTLIQlAIVMTqHFkswqbDDHtpgcWaXSSglUYKE
lqNsYCyaQXBzrFUbkAUAWAKrDgDtAlGMBqWQhpEwquZqWZJpslUfMllCwWptqINjrOBTLuPzwvXNbLCx
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qKWGc'''
countA = 0 #统计前边的大写字母
countB = 0 #统计小写字母
countC = 0 #统计后边的大写字母
length = len(str1)

for i in range(length):
    if str1[i] == '\n':
        continue

    """|如果str1[i]是大写字母:
       |-- 如果已经出现小写字母:
       |-- -- 统计后边的大写字母
       |-- 如果未出现小写字母:
       |-- -- 清空后边的大写字母的统计
       |-- -- 统计前边的大写字母
    """
    if str1[i].isupper():
        if countB == 1:
            countC += 1
            
        else:
            countA +=1
            countC = 0
    """|如果str1[i]是小写字母:
       |-- 如果小写字母前边不是三个大写字母(不符合条件):
       |-- -- 清空所有记录,重新统计
       |-- 如果小写字母前边是三个大写字母(符合条件):
       |-- -- 如果已经存在小写字母:
       |-- -- -- 清空所有记录,重新统计(出现两个小写字母)
       |-- -- 如果该小写字母是唯一的:
       |-- -- -- countB记录出现小写字母,准备开始统计countC
    """

    if str1[i].islower():
        if countA !=3:
            countA = 0
            countB = 0
            countC = 0
        else:
            if countB:
                countA = 0
                countB = 0
                countC = 0
            else:
                countB = 1
                countC = 0
                target = i



    """|如果前边和后边都是三个大写字母:
       |-- 如果后边第四个字母也是大写字母(不符合条件):
       |-- -- 情况记录B和C,重新统计
       |-- 如果后边仅有三个大写字母(符合条件):
       |-- -- 打印结果,并清空所有记录,进入下一轮统计
    """
    if countA == 3 and countC == 3:
        if (i+1)!= length and str[i+1].isupper():
            countB = 0
            countC = 0

        else:
            print(str1[target],end='')
            countA = 3
            countB = 0
            countC = 0
               
            
   

运行结果是这个,不知道什么原因
最佳答案
2017-7-9 21:09:20
2017-07-09_210806.png
11.JPG
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发表于 2017-7-9 21:09:20 | 显示全部楼层    本楼为最佳答案   
2017-07-09_210806.png
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 楼主| 发表于 2017-7-10 18:23:09 | 显示全部楼层

OK!了,真是非常感谢了
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发表于 2017-7-10 19:28:47 | 显示全部楼层
亭ting 发表于 2017-7-10 18:23
OK!了,真是非常感谢了

结贴给评个最佳呗
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 楼主| 发表于 2017-7-10 20:43:07 | 显示全部楼层
ba21 发表于 2017-7-10 19:28
结贴给评个最佳呗

下面点支持,就是评佳吗?
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发表于 2017-7-10 20:57:20 | 显示全部楼层
亭ting 发表于 2017-7-10 20:43
下面点支持,就是评佳吗?

2017-07-10_205558.png
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发表于 2017-7-11 07:43:33 | 显示全部楼层
亭ting 发表于 2017-7-10 20:43
下面点支持,就是评佳吗?

和ba21同一行,有一个绿色的按钮,如果你就得他回答的没问题,给他最佳答案
小甲鱼最新课程 -> https://ilovefishc.com
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发表于 2017-7-11 07:43:44 | 显示全部楼层
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 楼主| 发表于 2017-7-11 09:51:02 | 显示全部楼层
新手·ing 发表于 2017-7-11 07:43
和ba21同一行,有一个绿色的按钮,如果你就得他回答的没问题,给他最佳答案

请问那个绿色按钮在哪?是ba21那个框有个发消息的蓝色信封
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发表于 2017-7-11 11:36:53 | 显示全部楼层
亭ting 发表于 2017-7-11 09:51
请问那个绿色按钮在哪?是ba21那个框有个发消息的蓝色信封

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