How Python looks at information about system network traffic _python

Objective

Flow information can be directly in the /proc/net/dev view, the author implemented the program to use the command:

Python net.py interface

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

sudo ifconfig

For viewing.

The program that Python implements is as follows:

# coding:utf-8 Import sys, time, OS ' inter-| Receive | Transmit face |bytes packets errs drop FIFO frame compressed multicast|bytes packets errs Drop FIFO colls carrier Compr     essed 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 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 Ope N ('/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_b Ytes = 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)

The program entrance if name=='main' starts at the beginning, obtains by interface the parameter first, then calls the get_net_data() function to obtain the flow information, next all is some data processing process.

Summarize

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