Question

尝试打印与一个键关联的所有值，例如：

按马库斯搜索，我想返回5行。

词典：

file.FullName = "/factor/dktest/pdi/gl_accounts.txt"

StackTrace
   at Renci.SshNet.Common.AsyncResult.EndInvoke()
   at Renci.SshNet.Sftp.SftpSession.EndOpen(SftpOpenAsyncResult asyncResult)
   at Renci.SshNet.ServiceFactory.CreateSftpFileReader(String fileName, ISftpSession sftpSession, UInt32 bufferSize)
   at Renci.SshNet.SftpClient.InternalDownloadFile(String path, Stream output, SftpDownloadAsyncResult asyncResult, Action`1 downloadCallback)
   at Renci.SshNet.SftpClient.DownloadFile(String path, Stream output, Action`1 downloadCallback)
   at FtpTesting.frmSshNet.button7_Click(Object sender, EventArgs e) in C:\\Development\\FtpTesting\\FtpTesting\\frmSshNet.cs:line 98"

我不知道这是否是最简单的方法，但只会返回最后一行。

marcus {'TIME': 'Mar  3 15:49:33', 'CONNECTION': 'logout'}
fabin {'TIME': 'Mar  3 00:20:16', 'CONNECTION': 'login'}
marcus {'TIME': 'Mar  3 15:49:29', 'CONNECTION': 'logout'}
peter {'TIME': 'Mar  3 13:36:16', 'CONNECTION': 'logout'}
marcus {'TIME': 'Mar  3 14:28:56', 'CONNECTION': 'logout'}
peter {'TIME': 'Mar  3 02:17:34', 'CONNECTION': 'logout'}
marcus {'TIME': 'Mar  3 18:12:50', 'CONNECTION': 'logout'}
fabin {'TIME': 'Mar  3 22:50:15', 'CONNECTION': 'logout'}
peter {'TIME': 'Mar  3 15:14:16', 'CONNECTION': 'logout'}
marcus {'TIME': 'Mar  3 08:19:17', 'CONNECTION': 'login'}
peter {'TIME': 'Mar  3 15:16:45', 'CONNECTION': 'logout'}
fabin {'TIME': 'Mar  3 15:30:10', 'CONNECTION': 'logout'}
carl {'TIME': 'Mar  3 15:49:33', 'CONNECTION': 'logout'}

Answer 1

我怀疑您一直在向字典添加项目，并且字典只能具有唯一键。考虑：

D = {'marcus':{'TIME': 'Mar  3 15:49:33', 'CONNECTION': 'logout'},
     'fabin':{'TIME': 'Mar  3 00:20:16', 'CONNECTION': 'login'},
     'marcus':{'TIME': 'Mar  3 15:49:29', 'CONNECTION': 'logout'},
     'peter':{'TIME': 'Mar  3 13:36:16', 'CONNECTION': 'logout'},
     'marcus':{'TIME': 'Mar  3 14:28:56', 'CONNECTION': 'logout'},
     'peter':{'TIME': 'Mar  3 02:17:34', 'CONNECTION': 'logout'},
     'marcus':{'TIME': 'Mar  3 18:12:50', 'CONNECTION': 'logout'},
     'fabin':{'TIME': 'Mar  3 22:50:15', 'CONNECTION': 'logout'},
     'peter':{'TIME': 'Mar  3 15:14:16', 'CONNECTION': 'logout'},
     'marcus':{'TIME': 'Mar  3 08:19:17', 'CONNECTION': 'login'},
     'peter':{'TIME': 'Mar  3 15:16:45', 'CONNECTION': 'logout'},
     'fabin':{'TIME': 'Mar  3 15:30:10', 'CONNECTION': 'logout'},
     'carl':{'TIME': 'Mar  3 15:49:33', 'CONNECTION': 'logout'}}

for k,v in D.items():
    print(k,v)
    if k == 'marcus':
        print(v)

输出（匹配描述的行为）：

{'TIME': 'Mar  3 08:19:17', 'CONNECTION': 'login'}

尽管看起来有多个，但是字典只会保留唯一键的最后一个条目。如果需要具有相同名称的多个实例，则需要不同的结构。代替（可疑的）命令，使用命令列表：

L = [{'NAME':'marcus','TIME':'Mar  3 15:49:33','CONNECTION':'logout'},
     {'NAME':'fabin','TIME':'Mar  3 00:20:16','CONNECTION':'login'},
     {'NAME':'marcus','TIME':'Mar  3 15:49:29','CONNECTION':'logout'},
     {'NAME':'peter','TIME':'Mar  3 13:36:16','CONNECTION':'logout'},
     {'NAME':'marcus','TIME':'Mar  3 14:28:56','CONNECTION':'logout'},
     {'NAME':'peter','TIME':'Mar  3 02:17:34','CONNECTION':'logout'},
     {'NAME':'marcus','TIME':'Mar  3 18:12:50','CONNECTION':'logout'},
     {'NAME':'fabin','TIME':'Mar  3 22:50:15','CONNECTION':'logout'},
     {'NAME':'peter','TIME':'Mar  3 15:14:16','CONNECTION':'logout'},
     {'NAME':'marcus','TIME':'Mar  3 08:19:17','CONNECTION':'login'},
     {'NAME':'peter','TIME':'Mar  3 15:16:45','CONNECTION':'logout'},
     {'NAME':'fabin','TIME':'Mar  3 15:30:10','CONNECTION':'logout'},
     {'NAME':'carl','TIME':'Mar  3 15:49:33','CONNECTION':'logout'}]

for d in L:
    if d['NAME'] == 'marcus':
        print(d)

输出：

{'NAME': 'marcus', 'TIME': 'Mar  3 15:49:33', 'CONNECTION': 'logout'}
{'NAME': 'marcus', 'TIME': 'Mar  3 15:49:29', 'CONNECTION': 'logout'}
{'NAME': 'marcus', 'TIME': 'Mar  3 14:28:56', 'CONNECTION': 'logout'}
{'NAME': 'marcus', 'TIME': 'Mar  3 18:12:50', 'CONNECTION': 'logout'}
{'NAME': 'marcus', 'TIME': 'Mar  3 08:19:17', 'CONNECTION': 'login'}

另一个选项是列表的字典，将每个infodict附加到用户密钥的值中：

D = {'marcus':[{'TIME':'Mar  3 15:49:33','CONNECTION':'logout'},
               {'TIME':'Mar  3 15:49:29','CONNECTION':'logout'},
               {'TIME':'Mar  3 14:28:56','CONNECTION':'logout'},
               {'TIME':'Mar  3 18:12:50','CONNECTION':'logout'},
               {'TIME':'Mar  3 08:19:17','CONNECTION':'login'}],
     'fabin':[{'TIME':'Mar  3 00:20:16','CONNECTION':'login'},
              {'TIME':'Mar  3 22:50:15','CONNECTION':'logout'},
              {'TIME':'Mar  3 15:30:10','CONNECTION':'logout'}],
     'peter':[{'TIME':'Mar  3 13:36:16','CONNECTION':'logout'},
              {'TIME':'Mar  3 02:17:34','CONNECTION':'logout'},
              {'TIME':'Mar  3 15:14:16','CONNECTION':'logout'},
              {'TIME':'Mar  3 15:16:45','CONNECTION':'logout'}],
     'carl':[{'TIME':'Mar  3 15:49:33','CONNECTION':'logout'}]}

for item in D['marcus']:
    print(item)

输出：

{'TIME': 'Mar  3 15:49:33', 'CONNECTION': 'logout'}
{'TIME': 'Mar  3 15:49:29', 'CONNECTION': 'logout'}
{'TIME': 'Mar  3 14:28:56', 'CONNECTION': 'logout'}
{'TIME': 'Mar  3 18:12:50', 'CONNECTION': 'logout'}
{'TIME': 'Mar  3 08:19:17', 'CONNECTION': 'login'}

如何打印键的所有特定值？

1 个答案: