我有一个pandas列，其中包含windows事件日志的消息字段，如下所示。我如何通过并删除所有非键值样式对？
消息列包含类似的数据，但可能包含更多键：值类型，而不是显示，因为这只是一个事件ID。
message
['subject':'none','security id':'s-1-5-12','account name':'myaccountname','account domain':'domain', 'logon id':'0x3e6', ' process information':'none', 'new process id':'0x1a53', 'new process name':'c:\windows\system32\ipconfig.exe', 'token elevation type':'%%1932','creator process id':'0x1b33', 'process command line':'none', ' token elevation type indicates the type of token that was assigned to the new process in accordance with user account control policy.',' type 1 is a full token with no privileges removed or groups disabled. a full token is only used if user account control is disabled or if the user is the built-in administrator account or a service account.', ' type 2 is an elevated token with no privileges removed or groups disabled. an elevated token is used when user account control is enabled and the user chooses to start the program using run as administrator. an elevated token is also used when an application is configured to always require administrative privilege or to always require maximum privilege', ' and the user is a member of the administrators group.',' type 3 is a limited token with administrative privileges removed and administrative groups disabled. the limited token is used when user account control is enabled', ' the application does not require administrative privilege', ' and the user does not choose to start the program using run as administrator.']
['subject':'none','security id':'s-1-5-13','account name':'myaccountname','account domain':'domain', 'logon id':'0x3e6', ' process information':'none', 'new process id':'0x1a53', 'new process name':'c:\windows\system32\net.exe', 'token elevation type':'%%1932','creator process id':'0x1b33', 'process command line':'none', ' token elevation type indicates the type of token that was assigned to the new process in accordance with user account control policy.',' type 1 is a full token with no privileges removed or groups disabled. a full token is only used if user account control is disabled or if the user is the built-in administrator account or a service account.', ' type 2 is an elevated token with no privileges removed or groups disabled. an elevated token is used when user account control is enabled and the user chooses to start the program using run as administrator. an elevated token is also used when an application is configured to always require administrative privilege or to always require maximum privilege', ' and the user is a member of the administrators group.',' type 3 is a limited token with administrative privileges removed and administrative groups disabled. the limited token is used when user account control is enabled', ' the application does not require administrative privilege', ' and the user does not choose to start the program using run as administrator.']
预期产出：
subject security id account name logon id process information new processs id new process name token elevation type creator process id process command line
none s-1-5-12 myaccountname 0x3e6 none 0x1a53 c:\windows\system32\ipconfig.exe %%1932 0x1b33 none
如果我能从我的数据中得到非关键：值对，我知道我可以使用这种方法。
答案 0 :(得分：1)
您可以使用yaml，如果在None中丢失value，则会添加dict个值，然后移除所有None对：
print (df)
message
0 {'a':'none','b':'2', ' token.', ' type 1'}
import yaml
print (df.message.apply(yaml.load))
0 {' token.': None, ' type 1': None, 'b': '2', ...
Name: message, dtype: object
df.message = df.message.apply(lambda x: {k: v for k, v in yaml.load(x).items() if v})
print (df)
message
0 {'b': '2', 'a': 'none'}
使用您的数据：
df = pd.DataFrame({'message':["{'subject':'none', 'security id':'s-1-5-12', 'account name':'myaccountname','account domain':'domain', 'logon id':'0x3e6', ' process information':'none', 'new process id':'0x1a53', 'new process name':'c:\windows\system32\ipconfig.exe', 'token elevation type':'%%1932', 'creator process id':'0x1b33','process command line':'none', ' token elevation type indicates the type of token that was assigned to the new process in accordance with user account control policy.', ' type 1 is a full token with no privileges removed or groups disabled. a full token is only used if user account control is disabled or if the user is the built-in administrator account or a service account.', ' type 2 is an elevated token with no privileges removed or groups disabled. an elevated token is used when user account control is enabled and the user chooses to start the program using run as administrator. an elevated token is also used when an application is configured to always require administrative privilege or to always require maimum privilege', ' and the user is a member of the administrators group.',' type 3 is a limited token with administrative privileges removed and administrative groups disabled. the limited token is used when user account control is enabled', ' the application does not require administrative privilege', ' and the user does not choose to start the program using run as administrator.'}"]})
import yaml
df.message = df.message.apply(lambda x: {k: v for k, v in yaml.load(x).items() if v})
df1 = pd.DataFrame(df.pop('message').values.tolist(), index=df.index)
print (df1)
process information account domain account name creator process id \
0 none domain myaccountname 0x1b33
logon id new process id new process name \
0 0x3e6 0x1a53 c:\windows\system32\ipconfig.exe
process command line security id subject token elevation type
0 none s-1-5-12 none %%1932
编辑：
import yaml
df.message=df.message.str[0].apply(lambda x:{k:v for k,v in yaml.load('{'+x+'}').items() if v})
df1 = pd.DataFrame(df.pop('message').values.tolist(), index=df.index)
print (df1)
process information account domain account name creator process id \
0 none domain myaccountname 0x1b33
logon id new process id new process name \
0 0x3e6 0x1a53 c:\windows\system32\ipconfig.exe
process command line security id subject token elevation type
0 none s-1-5-12 none %%1932