python net.py interface

sudo ifconfig

# coding:utf-8import sys, time, os'''Inter-|  Receive                        | Transmit face |bytes  packets errs drop fifo frame compressed multicast|bytes  packets errs drop fifo colls carrier compressed  lo:  28169   364  0  0  0   0     0     0  28169   364  0  0  0   0    0     0 wlan1: 7432984  6018  0  0  0   0     0     0  681381  6115  0  0  0   0    0     0vmnet1:    0    0  0  0  0   0     0     0    0   56  0  0  0   0    0     0vmnet8:    0    0  0  0  0   0     0     0    0   55  0  0  0   0    0     0 eth0:    0    0  0  0  0   0     0     0    0    0  0  0  0   0    0     0'''_unit_=['B','KB','MB','GB','TB']def get_net_data(interface):  for line in open('/proc/net/dev', 'r'):    if line.split(':')[0].find(interface)>=0:      return map(int, line.split(':')[1].split())def convert_bytes_to_string(b):  cnt = 0  while b >= 1024.0:    b = float(b) / 1024.0    cnt += 1  return '%.2f%s'%(b,_unit_[cnt])if __name__ == '__main__':  interface = sys.argv[1]  while True:    net_data = get_net_data(interface)    receive_data_bytes = net_data[0]    transmit_data_bytes = net_data[8]    os.system('clear')    print 'Interface:%s  -> Receive Data: %s  Transmit Data: %s'%(interface, convert_bytes_to_string(receive_data_bytes), convert_bytes_to_string(transmit_data_bytes))    time.sleep(1)