[Python]代码    

import re,time    def get_net_info():      flow1 = open('/proc/net/dev')      lines = flow1.read()      flow1.close()      e =  re.compile('(eth.)')      r_re = re.compile('eth..(.*?\s)')      r_tr = re.compile(".*eth.*")      match_re = r_re.findall(lines)      match_tr = r_tr.findall(lines)      eth = e.findall(lines)      return (eth,lines,match_re,match_tr)    def net_flow():      net_re_c={}      net_tr_c={}          net_tr_a=[]       for i in get_net_info()[3]:          net_tr_a.append(i.split()[8])      net_tr_a=dict(zip(get_net_info()[0],net_tr_a))      net_re_a = dict(zip(get_net_info()[0],get_net_info()[2]))      print "{eth0:(transmit,receive)"      while True:                          time.sleep(1)                net_re_b = dict(zip(get_net_info()[0],get_net_info()[2]))          net_tr_b = []           for i in get_net_info()[3]:              net_tr_b.append(i.split()[8])          net_tr_b=dict(zip(get_net_info()[0],net_tr_b))           for i in net_re_b:              net_re_c[i] = int((float(net_re_b[i])-float(net_re_a[i]))/1024)          for i in net_tr_b:                net_tr_c[i]=int((float(net_tr_b[i])-float(net_tr_a[i]))/1024)          net_re_a = net_re_b          net_tr_a = net_tr_b           net_flow={}          for a in net_re_c:                          net_flow[a]=(net_tr_c[a],net_re_c[a])          print net_flow                                                  if __name__ == "__main__":      net_flow()