如何使用Python将/proc/net/dev的输出解析为每个接口的key:value对? [英] How can I parse the output of /proc/net/dev into key:value pairs per interface using Python?

问题描述

The output of /proc/net/dev on Linux looks like this:

Inter-|   Receive                                                |  Transmit
 face |bytes    packets errs drop fifo frame compressed multicast|bytes    packets errs drop fifo colls carrier compressed
    lo:18748525  129811    0    0    0     0          0         0 18748525  129811    0    0    0     0       0          0
  eth0:1699369069 226296437    0    0    0     0          0      3555 4118745424 194001149    0    0    0     0       0          0
  eth1:       0       0    0    0    0     0          0         0        0       0    0    0    0     0       0          0
  sit0:       0       0    0    0    0     0          0         0        0       0    0    0    0     0       0          0

如何使用Python将每个接口的输出解析为key:value对?我发现

How can I use Python to parse this output into key:value pairs for each interface? I have found this forum topic for achieving it using shell scripting and there is a Perl extension but I need to use Python.

推荐答案

这是格式很漂亮的输入，您可以通过拆分每一行，然后为其创建一个字典，轻松获得列和数据列表.

this is pretty formatted input and you can easily get columns and data list by splitting each line, and then create a dict of of it.

这是一个不带正则表达式的简单脚本

here is a simple script without regex

lines = open("/proc/net/dev", "r").readlines()

columnLine = lines[1]
_, receiveCols , transmitCols = columnLine.split("|")
receiveCols = map(lambda a:"recv_"+a, receiveCols.split())
transmitCols = map(lambda a:"trans_"+a, transmitCols.split())

cols = receiveCols+transmitCols

faces = {}
for line in lines[2:]:
    if line.find(":") < 0: continue
    face, data = line.split(":")
    faceData = dict(zip(cols, data.split()))
    faces[face] = faceData

import pprint
pprint.pprint(faces)

它输出

{'    lo': {'recv_bytes': '7056295',
            'recv_compressed': '0',
            'recv_drop': '0',
            'recv_errs': '0',
            'recv_fifo': '0',
            'recv_frame': '0',
            'recv_multicast': '0',
            'recv_packets': '12148',
            'trans_bytes': '7056295',
            'trans_carrier': '0',
            'trans_colls': '0',
            'trans_compressed': '0',
            'trans_drop': '0',
            'trans_errs': '0',
            'trans_fifo': '0',
            'trans_packets': '12148'},
 '  eth0': {'recv_bytes': '34084530',
            'recv_compressed': '0',
            'recv_drop': '0',
            'recv_errs': '0',
            'recv_fifo': '0',
            'recv_frame': '0',
            'recv_multicast': '0',
            'recv_packets': '30599',
            'trans_bytes': '6170441',
            'trans_carrier': '0',
            'trans_colls': '0',
            'trans_compressed': '0',
            'trans_drop': '0',
            'trans_errs': '0',
            'trans_fifo': '0',
            'trans_packets': '32377'}}

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