为什么map函数返回None？

Question

我正在尝试编写另一个加密器，但在解码过程中遇到了问题。 我已经阅读了很多关于这个论点的 StackOverflow 问题，我已经知道有人会把这个问题标记为重复，但我写这个是因为我找不到解决我的问题的方法。 encode 函数给了我这个字符串

4697625275273471234347364527724769

那是编码的消息（它说“你好世界！”），我有“密钥”（每次启动程序时随机生成），它包含解码消息所需的数字组合。 这是关键

12040512030417060213060413030716060915090216080313040713060215090916020217020419040215050918070812050414030615020715020512061602071404091407041805160407170516030919090718050315070618020719070218050812030317020918060815070817020816040318080414060914060414050419030818030513020419030517040912040218020918030616050313050413040319070618020617060518060314090616070612080615060613020912040413070619070918050217040512070813020816020513090812090218080715020317050217050313070419020717090712060814020816030518040317030616050915020215030516050518080314040619060815030816020613040518080817060913070312080316050717020714070212090915090812090517030916060218091905051608071904041303021209031606081707051209081908041302051808021602081202041508031708041204031608041504031708051307051908081405091809051207091408061805061806021306061902021805041706081902061303031606051803091309061202031504061702021206091402091604041906041709091609061506081908091707021604061604081309051508091905041903031903071202021705061409091205091803071409041505071204061709041909091209061409051309041707031207041709061704021804051907071703031707091605081907051506041308051305071407031708031607021902051802051705041209071909081709051804041804091403021503031507071208051307021507041806051404031904031903061208041607031204071609091904091809031807031206041308091907041908031809071704031807071909021209041509071304041804071309071707061603081305051606031304021208071908021407081803021807021406071808051602041502061903091205051508051206031803081802021503061602031403081403091909061409081703021606071504051609041409031504021308021509051905031206071605021206051507021408021402061907031502041705091504081308081207051902091704061603071503041202061605061303091507091408041906091608061609081504041706071205021405021603041303041305031607081403051703041406061304081306071308061307081602091207061203091403071503091202051607041308071506021407071803031305021309031805091203061906051406031304061704071207071706031508061206021709021404051403041508071704041203071403031306081705051709081708061706041207031909031309091507031708021404041704081702031404071307071203051409071

有点长。

现在我有了你需要将它们放入解码器的参数

input_text = input('Encrypted MSG\n> ')
key = input('Key\n> ')
alphabet = list(" qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM1234567890èéòç@à°#ù§[]+*,;.:-_<>£$₽%&()=?ì^/|!ėëęēêĖËĘĒÉÈÊūûüúŪÛÜÚÙīïįíìîĪÏĮÍÌκōøõœöôóŌØÕŒÖÓÒãåāáâäæÃÅĀªÀÁÂÄÆßẞÇñÑ¥¢∆¶×÷π√•`~©®™✓йцукенгшщзхфывапролджэячсмитьбюЙЦУКЕНГШЩЗХФЫВАПРОЛДЖЭЯЧСМИТЬБЮ⌂☻‼‰╛┐└┴┬├─┼╞╟╚╔╩╦╠═╬╧╨╤▬╥╙╘╒╓╫╪┘┌¤█▄▌▐▀αΣσ░▒▓│┤╡╢╖╕╣║╗╝¿þ¼½¾ⁿ⌠⌡≤≥±≡∩∞ΘΩð«»⌐¬¨↨↑↓→←↔₧☼♥♦♣♠♂♀♪◘○◙►◄▲▼Þ‘’“”„☭卐")

key = key.replace('0', '')
key = key.replace('1', ' ')
key = key.split()
key.insert(0,'1')

charmap = zip(key, alphabet)
_map = dict(charmap)
output_text = ''.join(str(_map.get(c)) for c in input_text)

print(f'Output\n> {output_text}')

输出 [实际]

Encrypted MSG
> 4697625275273471234347364527724769
Key
> 12040512030417060213060413030716060915090216080313040713060215090916020217020419040215050918070812050414030615020715020512061602071404091407041805160407170516030919090718050315070618020719070218050812030317020918060815070817020816040318080414060914060414050419030818030513020419030517040912040218020918030616050313050413040319070618020617060518060314090616070612080615060613020912040413070619070918050217040512070813020816020513090812090218080715020317050217050313070419020717090712060814020816030518040317030616050915020215030516050518080314040619060815030816020613040518080817060913070312080316050717020714070212090915090812090517030916060218091905051608071904041303021209031606081707051209081908041302051808021602081202041508031708041204031608041504031708051307051908081405091809051207091408061805061806021306061902021805041706081902061303031606051803091309061202031504061702021206091402091604041906041709091609061506081908091707021604061604081309051508091905041903031903071202021705061409091205091803071409041505071204061709041909091209061409051309041707031207041709061704021804051907071703031707091605081907051506041308051305071407031708031607021902051802051705041209071909081709051804041804091403021503031507071208051307021507041806051404031904031903061208041607031204071609091904091809031807031206041308091907041908031809071704031807071909021209041509071304041804071309071707061603081305051606031304021208071908021407081803021807021406071808051602041502061903091205051508051206031803081802021503061602031403081403091909061409081703021606071504051609041409031504021308021509051905031206071605021206051507021408021402061907031502041705091504081308081207051902091704061603071503041202061605061303091507091408041906091608061609081504041706071205021405021603041303041305031607081403051703041406061304081306071308061307081602091207061203091403071503091202051607041308071506021407071803031305021309031805091203061906051406031304061704071207071706031508061206021709021404051403041508071704041203071403031306081705051709081708061706041207031909031309091507031708021404041704081702031404071307071203051409071
Output
> NoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNone NoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNone

输出 [预期]

Encrypted MSG
> 4697625275273471234347364527724769
Key
> 12040512030417060213060413030716060915090216080313040713060215090916020217020419040215050918070812050414030615020715020512061602071404091407041805160407170516030919090718050315070618020719070218050812030317020918060815070817020816040318080414060914060414050419030818030513020419030517040912040218020918030616050313050413040319070618020617060518060314090616070612080615060613020912040413070619070918050217040512070813020816020513090812090218080715020317050217050313070419020717090712060814020816030518040317030616050915020215030516050518080314040619060815030816020613040518080817060913070312080316050717020714070212090915090812090517030916060218091905051608071904041303021209031606081707051209081908041302051808021602081202041508031708041204031608041504031708051307051908081405091809051207091408061805061806021306061902021805041706081902061303031606051803091309061202031504061702021206091402091604041906041709091609061506081908091707021604061604081309051508091905041903031903071202021705061409091205091803071409041505071204061709041909091209061409051309041707031207041709061704021804051907071703031707091605081907051506041308051305071407031708031607021902051802051705041209071909081709051804041804091403021503031507071208051307021507041806051404031904031903061208041607031204071609091904091809031807031206041308091907041908031809071704031807071909021209041509071304041804071309071707061603081305051606031304021208071908021407081803021807021406071808051602041502061903091205051508051206031803081802021503061602031403081403091909061409081703021606071504051609041409031504021308021509051905031206071605021206051507021408021402061907031502041705091504081308081207051902091704061603071503041202061605061303091507091408041906091608061609081504041706071205021405021603041303041305031607081403051703041406061304081306071308061307081602091207061203091403071503091202051607041308071506021407071803031305021309031805091203061906051406031304061704071207071706031508061206021709021404051403041508071704041203071403031306081705051709081708061706041207031909031309091507031708021404041704081702031404071307071203051409071
Output
> Hello world!

我用 Visual Studio Code 做的调试显示问题出在 map 函数上

你能帮我吗？

谢谢

Answer 1

您在加密的消息上一一阅读。 所以，如果你有4对加密邮件发现4 ，你需要有在地图上141上的按键，由于你对你的钥匙做处理。

在您的示例中，您生成的密钥上没有141这就是您得到None 。

我更改要使用的密钥12141512030417060213060413030716060915090216080313040713060215090916020217020419040215050918070812050414030615020715020512061602071404091407041805160407170516030919090718050315070618020719070218050812030317020918060815070817020816040318080414060914060414050419030818030513020419030517040912040218020918030616050313050413040319070618020617060518060314090616070612080615060613020912040413070619070918050217040512070813020816020513090812090218080715020317050217050313070419020717090712060814020816030518040317030616050915020215030516050518080314040619060815030816020613040518080817060913070312080316050717020714070212090915090812090517030916060218091905051608071904041303021209031606081707051209081908041302051808021602081202041508031708041204031608041504031708051307051908081405091809051207091408061805061806021306061902021805041706081902061303031606051803091309061202031504061702021206091402091604041906041709091609061506081908091707021604061604081309051508091905041903031903071202021705061409091205091803071409041505071204061709041909091209061409051309041707031207041709061704021804051907071703031707091605081907051506041308051305071407031708031607021902051802051705041209071909081709051804041804091403021503031507071208051307021507041806051404031904031903061208041607031204071609091904091809031807031206041308091907041908031809071704031807071909021209041509071304041804071309071707061603081305051606031304021208071908021407081803021807021406071808051602041502061903091205051508051206031803081802021503061602031403081403091909061409081703021606071504051609041409031504021308021509051905031206071605021206051507021408021402061907031502041705091504081308081207051902091704061603071503041202061605061303091507091408041906091608061609081504041706071205021405021603041303041305031607081403051703041406061304081306071308061307081602091207061203091403071503091202051607041308071506021407071803031305021309031805091203061906051406031304061704071207071706031508061206021709021404051403041508071704041203071403031306081705051709081708061706041207031909031309091507031708021404041704081702031404071307071203051409071

它找到w为4 ，这是预期的结果。

此致