理解将嵌套列表更改为词典列表

Question

我已将数据按摩到列表结构中......

[['keychain: "keychainname.keychain-db"', 
'version: 512', 
'class: 0x0000000F ', 
'attributes:\n   long string containing : and \n that needs to be split up into a list (by newline) of dictionaries (by regex and/or split() function) '], 
['keychain: "keychainname.keychain-db"', 
'version: 512', 
'class: 0x0000000F ', 
'attributes:\n   long string that needs to be split up '], 
['keychain: "keychainname.keychain-db"', 
'version: 512', 
'class: 0x0000000F ', 
'attributes:\n    long string that needs to be split up']]

我正在尝试使用理解来获取列表中的每个项目并将其拆分为具有格式的字典...

['{'keychain': 'keychainname.db', 
'version': '512', 
'class': '0x0000000F', 
'attribute':\n   long string containing : and \n that needs to be split up into a dictionary (by newline) of dictionaries (by regex and/or split() function) '}']

以下for循环似乎有效......

newdata = []
for item in data:
    eachdict = {}
    for each in item:
        new = each.split(':', 1)
        eachdict[new[0]] = new[1]
        newdata.append(eachdict)

但我理解的尝试不是......

newdata = [[{key:value for item in data} for line in item] for key, value in (line.split(':', 1))]

这种理解运行，但它没有正确完成嵌套...

newdata = [{key:value for item in data} for key, value in (item.split(':', 1),)]

我刚刚开始学习理解，并且我已经能够成功地使用它们将数据转换为嵌套列表的上述格式，但是当我下降三个级别并切换时，我很难理解嵌套列表到字典。

我很欣赏一些关于如何解决这个问题的建议。

对于奖励积分，我还需要将属性键内的长字符串拆分为字典字典。我希望能够引用'Alis'键，'labl'键等等。如果我在上面的例子中学习如何使用嵌套的理解，我可以自己解决这个问题。

attributes:\n
    "alis"<blob>="com.company.companyvpn.production.vpn.5D5AF9C525C25350E9CD5CEBED824BFD60E42110"\n
    "cenc"<uint32>=0x00000003 \n
    "ctyp"<uint32>=0x00000001 \n
    "hpky"<blob>=0xB7262C7D5BCC976744F8CA6DE5A80B755622D434  "\\267&,}[\\314\\227gD\\370\\312m\\345\\250\\013uV"\\3244"\n
    "issu"<blob>=0x306E3128302606035504030C1F4170706C6520436F72706F726174652056504E20436C69656E7420434120313120301E060355040B0C1743657274696669636174696F6E20417574686F7269747931133011060355040A0C0A4170706C6520496E632E310B3009060355040613025553  "0n1(0&\\006\\003U\\004\\003\\014\\037Company Corporate VPN Client CA 11 0\\036\\006\\003U\\004\\013\\014\\027Certification Authority1\\0230\\021\\006\\003U\\004\\012\\014\\012Company Inc.1\\0130\\011\\006\\003U\\004\\006\\023\\002US"\n
    "labl"<blob>="com.company.companyvpn.production.vpn.5D5AF9C525C25350E9CD5CEBED824BFD60E42110"\n
    "skid"<blob>=0xB7262C7D5BCC976744F8CA6DE5A80B755622D434  "\\267&,}[\\314\\227gD\\370\\312m\\345\\250\\013uV"\\3244"\n    "snbr"<blob>=0x060A02F6F9880D69  "\\006\\012\\002\\366\\371\\210\\015i"\n
    "subj"<blob>=0x3061315F305D06035504030C56636F6D2E6170706C652E6973742E64732E6170706C65636F6E6E656374322E70726F64756374696F6E2E76706E2E35443541463943353235433235333530453943443543454245443832344246443630453432313130  "0a1_0]\\006\\003U\\004\\003\\014Vcom.company.companyvpn.production.vpn.5D5AF9C525C25350E9CD5CEBED824BFD60E42110"' 

对于背景......

我在Mac上使用“security dump-keychain”的输出来创建一个很好的Python数据结构来查找键。此命令的check_output是一个长字符串，其中包含一些不一致的格式和嵌入的换行符，我需要清理这些换行符以将数据放入字典词典列表中。

对于那些对Mac管理员主题感兴趣的人，我们可以删除在重置AD密码时保存Active Directory密码的项目，以便该帐户不被锁定，例如，Outlook一遍又一遍地向Exchange提交旧密码。

Answer 1

这可能是一种方法：

data = [['keychain: "keychainname.keychain-db"',  'version: 512',  'class: 0x0000000F ',  'attributes:\n   long string containing : and \n that needs to be split up into a list (by newline) of dictionaries (by regex and/or split() function) '],  ['keychain: "keychainname.keychain-db"',  'version: 512',  'class: 0x0000000F ',  'attributes:\n   long string that needs to be split up '],  ['keychain: "keychainname.keychain-db"',  'version: 512',  'class: 0x0000000F ',  'attributes:\n    long string that needs to be split up']]

result = [dict([item.split(':', 1) for item in items]) for items in data]

>>> [{'keychain': ' "keychainname.keychain-db"', 'version': ' 512', 'class': ' 0x0000000F ', 'attributes': '\n   long string containing : and \n that needs to be split up into a list (by newline) of dictionaries (by regex and/or split() function) '}, {'keychain': ' "keychainname.keychain-db"', 'version': ' 512', 'class': ' 0x0000000F ', 'attributes': '\n   long string that needs to be split up '}, {'keychain': ' "keychainname.keychain-db"', 'version': ' 512', 'class': ' 0x0000000F ', 'attributes': '\n    long string that needs to be split up'}]

split将每个单独的字符串分解为一个键值对。内部列表理解循环遍历单个项目中的每个键值对。外部列表理解循环遍历主列表中的每个项目。