How to view system network traffic information in python-Python Tutorial-php.cn

How to view system network traffic information in python

高洛峰

Release： 2017-02-23 11:01:42

Original

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Preface

Traffic information can be viewed directly in /proc/net/dev. The program implemented by the author uses the command:

python net.py interface

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interface is the name of the network card, what network card to use, what network cards the computer has, you can use

sudo ifconfig

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Check it out.

The program implemented in Python is as follows:

# coding:utf-8
import sys, time, os


&#39;&#39;&#39;
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     0
vmnet1:    0    0  0  0  0   0     0     0    0   56  0  0  0   0    0     0
vmnet8:    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

&#39;&#39;&#39;

_unit_=[&#39;B&#39;,&#39;KB&#39;,&#39;MB&#39;,&#39;GB&#39;,&#39;TB&#39;]

def get_net_data(interface):
  for line in open(&#39;/proc/net/dev&#39;, &#39;r&#39;):
    if line.split(&#39;:&#39;)[0].find(interface)>=0:
      return map(int, line.split(&#39;:&#39;)[1].split())

def convert_bytes_to_string(b):
  cnt = 0
  while b >= 1024.0:
    b = float(b) / 1024.0
    cnt += 1
  return &#39;%.2f%s&#39;%(b,_unit_[cnt])

if __name__ == &#39;__main__&#39;:
  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(&#39;clear&#39;)
    print &#39;Interface:%s  -> Receive Data: %s  Transmit Data: %s&#39;%(interface, convert_bytes_to_string(receive_data_bytes), convert_bytes_to_string(transmit_data_bytes))
    time.sleep(1)

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The program entry is from if Starting from name=='main', first get the interface through the parameters, and then call the get_net_data() function to get the traffic information, followed by some data processing.

Summary

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