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#!/usr/bin/env Python
import time
import sys

if len(sys.argv) > 1:
        INTERFACE = sys.argv[1]
else:
        INTERFACE = 'eth0'
STATS = []
print 'Interface:',INTERFACE

def     rx():
        ifstat = open('/proc/net/dev').readlines()
        for interface in  ifstat:
                if INTERFACE in interface:
                        stat = float(interface.split(':')[1].split()[0])
                        STATS[0:] = [stat]

def     tx():
        ifstat = open('/proc/net/dev').readlines()
        for interface in  ifstat:
                if INTERFACE in interface:
                        stat = float(interface.split(':')[1].split()[8])
                        STATS[1:] = [stat]

print   'In                     Out'
rx()
tx()

while   True:
        time.sleep(1)
        rxstat_o = list(STATS)
        rx()
        tx()
        RX = float(STATS[0])
        RX_O = rxstat_o[0]
        TX = float(STATS[1])
        TX_O = rxstat_o[1]
        RX_RATE = round((RX - RX_O)/1024/1024,3)
        TX_RATE = round((TX - TX_O)/1024/1024,3)
        print RX_RATE ,'MB              ',TX_RATE ,'MB'

תÔØÓÚ:https://www.cnblogs.com/limt/p/6840735.html