在关键字python之后打印字符串

Question

我设法从 txt 文件中提取以下行

05/19/2014, 15:24:14.455> LVL:2 RC:   0          SERVER :server main: TERA_MGMT_SYS_SESS_EVENT_RESET with disconnect cause (0x105)

现在如何从中取出105？

#!/usr/bin/env python
import sys, re, os

lineContains = re.compile(r'(?=.*disconnect cause)')
lineContainsCode = re.compile(r'cause\s*\(.*?(\d+)\)')
filename = open ("pcoip_server_2014_05_19_00000560.txt", 'r')

for line in filename:
    if lineContains.match(line):
        print 'The file has: '
        print line
        code = lineContainsCode.search(line).group(1)
        print 'The code is:', code
        if code == 001:
            print 'PCoIP session terminated due to lost network.'
        elif code == 100:
            print 'PCoIP connection not established due to failure of PCoIP server initialization. This should not occur. Please contact Teradici support.'
        elif code == 101:
            print 'PCoIP connection not established due to failure of PCoIP server initialization. This should not occur in normal operation. Note: If the Welcome Screen is enable in the View Administrator a ConnectionTicketTimeout will trigger a disconnect after 15 min with this code'
        elif code == 102:
            print 'PCoIP session terminated due to VMware View Connection Server (broker) maximum session duration (Connection Server setting) exceeded.'
        elif code == 103:
            print 'PCoIP session terminated due to the VDI user selecting Logoff or Restart from Windows in the VDI session'
        elif code == 104:
            print 'PCoIP session terminated due to admin manually disconnected the session from the Administrative Web Interface.'
        elif code == 105:
            print 'PCoIP session terminated due to login from an alternate location OR Pre-connection warmup initialization of PCoIP Server. This is not for actual connection. If the size of the log is under 15 Kbytes, this is a pre-connection warmup startup/shutdown sequence.'
        elif code == 200:
            print 'PCoIP session terminated due to the user right-clicking the host driver icon in the tray and then selecting Menu > Disconnect. Applicable only to clients connecting to a hard host and not VDI.'
        elif code == 201:
            print 'PCoIP connection not established due to incompatible host driver version (not used for VDI).'
        elif code == 300:
            print 'PCoIP session terminated due to the user closing the View Client window or due to the user ending the View application task inside the Windows Task Manager'
        elif code == 301:
            print 'PCoIP session terminated due to the user clicking the zero client\'s Disconnect button. Not applicable for soft clients.'
        elif code == 302:
            print 'PCoIP session terminated due to the user clicking the Disconnect button in the client Administrative Web Interface. Not applicable for soft clients.'
        elif code == 303:
            print 'The VMware View Connection Server (broker) requested the session to end.'
        elif code == 304:
            print 'PCoIP session terminated due to Power Sleep disconnect (not used for VDI).'
        elif code == 305:
            print 'PCoIP session terminated due to user pulling out the smart card used for user authentication.'
        elif code == 306:
            print 'PCoIP session terminated due to user taking action specified by OneSign to be a disconnect command (for example, double tapping the card).'
        elif code == 400:
            print 'Zero client and View 4.5 and earlier: PCoIP session terminated due to network issues on TCP/SSL connection (keepalive ping timeout).'
        elif code == 401:
            print 'PCoIP connection not established due to networking issues or failure to open drivers, such as video, audio, or USB.'
        elif code == 402:
            print 'PCoIP connection not established due to networking issues.'
        elif code == 403:
            print 'PCoIP session terminated due to various reasons. For example, network lost or client/server crash.'
        elif code == 404:
            print 'PCoIP connection not established due to inability to use the VMware video driver on the server.'
        elif code == 405:
            print 'PCoIP connection not established due to client and server not having a common encryption method enabled.'
        elif code == 406:
            print 'Zero Client and View 4.5 and earlier: PCoIP session terminated due to network issues on TCP/SSL connection. Zero client and View 4.6 (and later). This is normal operation since the TCP/SSL connection is terminated right after session negotiation.'
        elif code == 407:
            print 'PCoIP connection not established due to the View Security Server detecting that AES encryption is disabled on either the client and/or server.'
        else:
            print 'code not found in KB.'

filename.close()

给我错误 文件“pcoip_disconnect_codes.py”，第 20 行 elif 代码 == 102： ^ IndentationError: unindent 不匹配任何外部缩进级别

Answer 1

您可以尝试以下正则表达式来获取 () 括号内的数字。下面的正则表达式包含字符串 cause，因为它有助于正确匹配确切的行以及 () 中的数字。

cause \(.*?(\d+)\)

DEMO

你的代码是，

lineContainsCode = re.compile(r'cause \(.*?(\d+)\)')

Answer 2

对于非正则表达式方法：

code = line.split("(")[-1].split(")")[0].split("x")[-1]
# more readable:
# code = line.split("(")[-1]
#            .split(")")[0]
#            .split("x")[-1]

这将拆分所有文字开放括号上的字符串，并在-1 上建立索引（即抓住最后一个）。然后在所有文字关闭括号上拆分它，并在0 上进行索引（即抓住第一个），然后在所有文字上拆分"x"s 并在-1 上建立索引（即抓住最后一个）

KEY: ---- items not selected
     ++++ items selected
       |  split point (NOT SELECTED)

1.
05/19/2014, 15:24:14.455> LVL:2 RC:   0          SERVER :server main: TERA_MGMT_SYS_SESS_EVENT_RESET with disconnect cause (0x105)
---------------------------------------------------------------------------------------------------------------------------|++++++

2.
0x105)
+++++|--

3.
0x105
-|+++

导致105

编辑哈希图示例：

code = lineContainsCode.search(line).group(1)
hashmap = {"001":'PCoIP session terminated due to lost network.',
           "100":'PCoIP connection not established due to failure of PCoIP server initialization. This should not occur. Please contact Teradici support.',           
            ...
           "407":'PCoIP connection not established due to the View Security Server detecting that AES encryption is disabled on either the client and/or server.'}
error_msg = hashmap.get(code,'code not found in KB.')
print(error_msg)