曾哥870 发表于 2021-3-30 21:01:15

老哥们能解释一下这些变量的替换,为啥有时需要用别的替换,有时又不需要,我很难受。

这是python二十讲最后一题

wp231957 发表于 2021-3-30 21:14:34

20讲最后一题是神马鬼,能吃吗

曾哥870 发表于 2021-3-30 21:18:42

wp231957 发表于 2021-3-30 21:14
20讲最后一题是神马鬼,能吃吗

仔细看还是能明白的,就是有些变量替换实在肝不动,稍微换点就没结果,或者结果错误了

wp231957 发表于 2021-3-30 21:26:15

曾哥870 发表于 2021-3-30 21:18
仔细看还是能明白的,就是有些变量替换实在肝不动,稍微换点就没结果,或者结果错误了

编程最主要的是理解一段代码的本质,而不是背诵代码,请问,这个所谓的题目你自己独立能写出来吗,如果不能,那么退而求其次,这段代码的核心思想你知道吗,如果不知道,那你去乱改代码有意义吗

小伤口 发表于 2021-3-30 21:30:05

把题目发出来吧
{:10_254:}

曾哥870 发表于 2021-3-30 22:20:43

wp231957 发表于 2021-3-30 21:26
编程最主要的是理解一段代码的本质,而不是背诵代码,请问,这个所谓的题目你自己独立能写出来吗,如果不 ...

主要思想坑定知道呀,就是最后打印为啥要用一个别的变量代替i,不明白

曾哥870 发表于 2021-3-30 22:25:03

小伤口 发表于 2021-3-30 21:30
把题目发出来吧

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q

1073551873 发表于 2021-3-31 12:14:33

{:5_103:}

zsc123xyz147 发表于 2021-3-31 16:58:00

楼主这个代码能跑出最终结果么

jackz007 发表于 2021-3-31 17:06:43

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qKWGc'''
s , p = 'a' + '' . join(str1 . split('\n')) + 'a' , ''
for k in range(4 , len(s) - 4):
    if s . islower() and s . isupper() and s . islower() and s . isupper() and s . islower():
      p += s
print(p)

曾哥870 发表于 2021-3-31 20:48:06

zsc123xyz147 发表于 2021-3-31 16:58
楼主这个代码能跑出最终结果么

可以吧

小伤口 发表于 2021-4-1 18:56:51

曾哥870 发表于 2021-3-30 22:20
主要思想坑定知道呀,就是最后打印为啥要用一个别的变量代替i,不明白

就像一堆白球里有少量的红球,要求你找出红球
每次你找到一个,是不是要放在另一只手里
这个也是一样的道理{:10_254:}

wujiale 发表于 2021-4-1 21:24:03

代码发全啊,虽然不全但是 t = i 应该是这个i是不是后面会变,所以要这个时候的给 t 赋值 i 的值 。            假设i = 2,   t = i 那么 t = 2,   下一句代码 i 可能会变成另外一个数字 , 如果想打印这个"2"的话那么用 t = i 是比较合理的

对服执纪9966 发表于 2021-4-2 02:29:24

本帖最后由 对服执纪9966 于 2021-4-2 02:33 编辑


所以按照你的“for i in range(lenght):”,得出来的就是一个数字而已,这个 i 在这里正确的应该是结合列表, q[ i ]用来代表位置。

这个变量 t 是表示迭代到 i 的时候,q [ i ]的值,而不是 i 的值。用 i 赋值给 t 当然没用了。

用法和概念这些细节的东西理解清楚就好了。可能说的不详细,大家可以继续讨论。

曾哥870 发表于 2021-4-2 10:47:47

wujiale 发表于 2021-4-1 21:24
代码发全啊,虽然不全但是 t = i 应该是这个i是不是后面会变,所以要这个时候的给 t 赋值 i 的值 。      ...

说到我心里去啦

wujiale 发表于 2021-4-3 14:22:11

曾哥870 发表于 2021-4-2 10:47
说到我心里去啦

{:10_277:}
页: [1]
查看完整版本: 老哥们能解释一下这些变量的替换,为啥有时需要用别的替换,有时又不需要,我很难受。