python：查看linux网卡流量
#!/usr/bin/env pythonimport time,sys
def all_flow(INTERFACE):
f = open('/proc/net/dev')
flow_info=f.readlines()
in_flow=[]
out_flow=[]
for eth_dev in flow_info:
if INTERFACE in eth_dev:
in_flow.append(int(eth_dev.split(':').split()))
out_flow.append(int(eth_dev.split(':').split()))
f.close()
return in_flow,out_flow
def format_flow(flow):
flow_n = float(flow)
if flow_n > 1000000:
return '%.3f MB' % (flow_n/1024/1024)
else:
return '%.3f KB' % (flow_n/1024)
if __name__=='__main__':
if len(sys.argv) > 1:
INTERFACE = sys.argv
else:
INTERFACE = 'eth'
in_flows = {}
out_flows = {}
all_flows0 = all_flow(INTERFACE)
count = 0
while count < 5:
time.sleep(1)
all_flows1=all_flow(INTERFACE)
for x in range(len(all_flows0)):
if len(sys.argv) >1:
curr_eth = INTERFACE
else:
curr_eth = 'eth%s' % x
if len(in_flows) == x:
in_flows= []
out_flows=[]
print curr_eth+" in:"+ format_flow(all_flows1-all_flows0)+"out:"+\
format_flow(all_flows1-all_flows0)
in_flows.append(all_flows1-all_flows0)
out_flows.append(all_flows1-all_flows0)
all_flows0 = all_flows1
count=count+1
for key in in_flows:
sum_a=0
in_flow=''
for i in in_flows:
sum_a = sum_a+i
in_flow = in_flow + format_flow(i) + ' '
#print key + ' flow_in is: %s'% in_flow
print key +" average of flow_in is: %s" % format_flow(sum_a/count)
for key in out_flows:
sum_a=0
out_flow=''
for i in out_flows:
sum_a = sum_a+i
out_flow = out_flow + format_flow(i) + ' '
#print key + ' flow_out is: %s'% out_flow
print key +" average of flow_out is: %s" % format_flow(sum_a/count)
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