【python】查看Linux实时网速

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import time
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speed_down=[]
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speed_up=[]
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speed_name=[]
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speed_up_1=[]
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speed_down_1=[]
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while True:
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    i=open('/proc/net/dev','r').readlines()
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    for p in i:
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        p=p.split( )
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        if p[1].isdigit() and p[1]!='0':
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            index=0
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            for i in range(len(speed_name)):
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                if p[0]==speed_name[i]:
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                    index=i
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                    break
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            if p[0] in speed_name:
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                pass
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            else:
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                speed_name.append(p[0])
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                speed_down_1.append(p[1])
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                speed_up_1.append(p[9])
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                speed_down.append(0)
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                speed_up.append(0)
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                break
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            speed_down[index]=(float)((int)(p[1])-(int)(speed_down_1[index]))/1000
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            speed_up[index]=(float)((int)(p[9])-(int)(speed_up_1[index]))/1000
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            speed_down_1[index]=p[1]
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            speed_up_1[index]=p[9]
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    for i in range(len(speed_name)):
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        print("网卡："+speed_name[i])
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        print("上行："+speed_up[i])
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        print("下行："+speed_down[i])
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    time.sleep(1)