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('\n\n')
         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)