python 获取 mac 地址 的例子，有需要的朋友可以参考下。

#!/bin/python

import os
import re

def GetMac():
    if os.name == 'nt':
        try:
            ret = ''
            CmdLine = 'ipconfig /all'
            r = os.popen(CmdLine).read()
            if r:
                L = re.findall('Physical Address.*?([0-9,A-F]{2}-[0-9,A-F]{2}-[0-9,A-F]{2}-[0-9,A-F]{2}-[0-9,A-F]{2}-[0-9,A-F]{2})', r)
                if len(L) > 0:
                    ret = L[0]
        except:
            pass
        
    elif os.name == "posix":
        try:
            ret = ''
            CmdLine = 'ifconfig'
            r = os.popen(CmdLine).read()
            if r:
                L = re.findall('HWaddr.*?([0-9,A-F]{2}:[0-9,A-F]{2}:[0-9,A-F]{2}:[0-9,A-F]{2}:[0-9,A-F]{2}:[0-9,A-F]{2})', r)
                if len(L) > 0:
                    ret = L[0]
        except:
            pass
    else:
        pass
    return ret

if __name__ == '__main__':
    mac = GetMac()
    print mac
    m=raw_input()

一个简单的方法：
>>> import uuid

>>> node = uuid.getnode()
>>> mac = uuid.UUID(int=node)
>>> addr = mac.hex[-12:]
>>> addr

更多有关python的内容，可以参考python 教程系列文章。