python编程实例-使用正则收集IP信息

#!/usr/bin/env python

from subprocess import PIPE,Popen
import re

def getIfconfig():
        p = Popen(['ifconfig'],stdout=PIPE)
        data = p.stdout.read().split('

')
        return [i for i in data if i and not i.startswith('lo')]

def parseIfconfig(data):
        re_devname = re.compile(r'(br|eth|lo|em|virbr|bond)[d:]+')
        re_mac = re.compile(r'HWaddr ([0-9A-F:]{17})',re.M)
        re_ip = re.compile(r'inet addr:([d.]{7,15})',re.M)
        devname = re_devname.search(data)
        if devname:
                devname = devname.group()
        else:
                devname = ''
        mac = re_mac.search(data)
        if mac:
                mac = mac.group(1)
        else:
                mac = ''
        ip =re_ip.search(data)
        if ip:
                ip = ip.group(1)
        else:
                ip = ''
        return {devname : [ip,mac]}

if __name__ == '__main__':
        data = getIfconfig()
        for i in data:
                print parseIfconfig(i)