Regular_expression巨蟒
Regular_expression巨蟒
提问于 2016-04-21 16:43:53
我有一个file.txt，我想检测在第一次出现Report之后出现的第一个udp:data。
我使用了另一种方法，但我喜欢在Python中使用正则表达式。
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.236896000 eth:ip:udp:adp
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.238663000 eth:ip:udp:adp
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.240578000 eth:ip:udp:adp
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.242551000 eth:ip:udp:adp
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.244473000 eth:ip:udp:adp
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.246256000 eth:ip:udp:adp
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.248466000 eth:ip:udp:adp
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.250880000 eth:ip:udp:adp
192.168.1.13 232.0.4.3 Apr 20, 2016 17:17:04.252270000 eth:ip:igmp Membership Report group 232.0.4.3
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.252680000 eth:ip:udp:data Source port: 49152 Destination port: aesop
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.254618000 eth:ip:udp:adp
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.256553000 eth:ip:udp:adp
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.258349000 eth:ip:udp:adp
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.260234000 eth:ip:udp:adp
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.262228000 eth:ip:udp:adp
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.264001000 eth:ip:udp:adp
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.265925000 eth:ip:udp:adp
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.268151000 eth:ip:udp:adp
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.270116000 eth:ip:udp:adp
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.271854000 eth:ip:udp:adp
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.273810000 eth:ip:udp:adp
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.275996000 eth:ip:udp:adp
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.278013000 eth:ip:udp:adp
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.279936000 eth:ip:udp:data Source port: 49152 Destination port: aesop
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.281734000 eth:ip:udp:adp
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.283952000 eth:ip:udp:adp
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.285879000 eth:ip:udp:adp
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.287654000 eth:ip:udp:adp
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.289663000 eth:ip:udp:adp
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.291609000 eth:ip:udp:adp
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.293337000 eth:ip:udp:adp
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.295284000 eth:ip:udp:adp 回答 1
Stack Overflow用户
发布于 2016-04-21 16:52:32
这可以使用标准的外壳工具sed、grep和head轻松完成。
$ sed -n '/Report/,$p' so.txt | grep udp:data | head -1
193.253.155.253 232.0.4.2 Apr 20, 2016 17:17:04.252680000 eth:ip:udp:data Source port: 49152 Destination port: aesop页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/36764292
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