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hangx969
python-operation-scripts
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python-operation-scripts
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python-logging
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prase-IP-from-logs.py
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prase-IP-from-logs.py
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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
日志文件 IP 地址提取脚本
功能描述:
本脚本用于从日志文件中提取所有的 IPv4 地址。通过正则表达式匹配标准的 IP 地址格式,
快速识别和提取日志中的 IP 信息,支持各种日志格式的 IP 地址解析。
技术实现:
- 使用 re 模块进行正则表达式匹配
- 采用预编译正则表达式提高匹配效率
- 使用 findall() 方法获取所有匹配结果
- 文件读取采用上下文管理器确保资源释放
正则表达式详解:
模式: r'\\b(?:[0-9]{1,3}\\.){3}[0-9]{1,3}\\b'
- \\b: 单词边界,确保匹配完整的 IP 地址
- (?:[0-9]{1,3}): 非捕获组,匹配1-3位数字
- \\.: 匹配点号分隔符
- {3}: 重复3次,匹配前三个数字段
- [0-9]{1,3}: 匹配最后一个数字段
IP 地址格式:
IPv4 地址标准格式: XXX.XXX.XXX.XXX
- 每个数字段范围: 0-255
- 分隔符: 点号 (.)
- 总长度: 7-15 个字符
"""
import re
log_file = './example.txt'
#读取日志文件
with open(log_file, 'r') as f:
logs = f.read()
ip_pattern = re.compile(r'\b(?:[0-9]{1,3}\.){3}[0-9]{1,3}\b')
ips = ip_pattern.findall(logs)
for ip in ips:
print(ip)
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