如何匹配文本文件中的两个模式答案

【问题标题】：How I can match two pattern in text file如何匹配文本文件中的两个模式
【发布时间】：2021-10-13 00:26:00
【问题描述】：

我如何在如下文本文件中匹配两个模式（选择包含“205”和“212”的两行）并获取它们。现在我的代码只得到一个模式的结果。谢谢大家。

pattern = re.compile(r"^\S+ \S+ \S+ ([205][212])\d+.*$")

我的文本文件

mpls switch-l2vc 10.123.143.209 205316002 tunnel-policy TE between 10.123.130.1 205316004 tunnel-policy TE backup 10.123.130.2 205316004 tunnel-policy TE encapsulation vlan
mpls switch-l2vc 10.124.17.165 205315402 tunnel-policy TE between 10.123.130.1 205315404 tunnel-policy TE backup 10.123.130.2 205315404 tunnel-policy TE encapsulation vlan
mpls switch-l2vc 10.124.18.113 212359002 tunnel-policy TE between 10.123.130.1 205359004 tunnel-policy TE backup 10.123.130.2 205359004 tunnel-policy TE encapsulation vlan
mpls switch-l2vc 10.124.17.161 212315002 tunnel-policy TE between 10.123.130.1 205315004 tunnel-policy TE backup 10.123.130.2 205315004 tunnel-policy TE encapsulation vlan
mpls switch-l2vc 10.124.17.168 205315702 tunnel-policy TE between 10.123.130.1 205315704 tunnel-policy TE backup 10.123.130.2 205315704 tunnel-policy TE encapsulation vlan

【问题讨论】：

标签： python regex text

【解决方案1】：

你需要

^\S+ \S+ \S+ (?:205|212)\d.*$

请参阅regex demo。详情：

^ - 字符串开头
\S+ \S+ \S+ - 三个以空格分隔的单词
(?:205|212) - 205 或 212
\d - 数字
.*$ 行的其余部分，字符串的结尾。

【讨论】：

【解决方案2】：

试试这个模式：(?=(^.*205))(?=(.*212.*$))|(?=(^.*212))(?=(.*205.*$))

代码：

import re

text = """
mpls switch-l2vc 10.123.143.209 205316002 tunnel-policy TE between 10.123.130.1 205316004 tunnel-policy TE backup 10.123.130.2 205316004 tunnel-policy TE encapsulation vlan
mpls switch-l2vc 10.124.17.165 205315402 tunnel-policy TE between 10.123.130.1 205315404 tunnel-policy TE backup 10.123.130.2 205315404 tunnel-policy TE encapsulation vlan
mpls switch-l2vc 10.124.18.113 212359002 tunnel-policy TE between 10.123.130.1 205359004 tunnel-policy TE backup 10.123.130.2 205359004 tunnel-policy TE encapsulation vlan
mpls switch-l2vc 10.124.17.161 212315002 tunnel-policy TE between 10.123.130.1 205315004 tunnel-policy TE backup 10.123.130.2 205315004 tunnel-policy TE encapsulation vlan
mpls switch-l2vc 10.124.17.168 205315702 tunnel-policy TE between 10.123.130.1 205315704 tunnel-policy TE backup 10.123.130.2 205315704 tunnel-policy TE encapsulation vlan
"""
pattern = "(?=(^.*205))(?=(.*212.*$))|(?=(^.*212))(?=(.*205.*$))"

print(re.findall(pattern, text, re.MULTILINE)

输出：

[('mpls switch-l2vc 10.124.18.113 212359002 tunnel-policy TE between 10.123.130.1 205359004 tunnel-policy TE backup 10.123.130.2 205', 'mpls switch-l2vc 10.124.18.113 212359002 tunnel-policy TE between 10.123.130.1 205359004 tunnel-policy TE backup 10.123.130.2 205359004 tunnel-policy TE encapsulation vlan'), ('mpls switch-l2vc 10.124.17.161 212315002 tunnel-policy TE between 10.123.130.1 205315004 tunnel-policy TE backup 10.123.130.2 205', 'mpls switch-l2vc 10.124.17.161 212315002 tunnel-policy TE between 10.123.130.1 205315004 tunnel-policy TE backup 10.123.130.2 205315004 tunnel-policy TE encapsulation vlan')]

【讨论】：