从 python 子进程运行 linux grep 命令 [英] run linux grep command from python subprocess

问题描述

我知道已经有关于如何在 python 中使用子进程来运行 linux 命令的帖子，但我只是无法获得正确的语法.请帮忙.这是我需要运行的命令...

I know there are posts already on how to use subprocess in python to run linux commands but I just cant get the syntax correct for this one. please help. This is the command I need to run...

/sbin/ifconfig eth1 | grep "inet addr" | awk -F: '{print $2}' | awk '{print $1}'

好的，这就是我目前所拥有的，但会出现语法错误...

Ok this is what I have at the moment that gives a syntax error...

import subprocess
self.ip = subprocess.Popen([/sbin/ifconfig eth1 | grep "inet addr" | awk -F: '{print $2}' | awk '{print $1}'])

非常感谢任何帮助.

推荐答案

这之前已经讨论过很多次了；但这里有一个简单的纯 Python 替代品，用于替代低效的后处理.

This has been gone over many, many times before; but here is a simple pure Python replacement for the inefficient postprocessing.

from subprocess import Popen, PIPE
eth1 = subprocess.Popen(['/sbin/ifconfig', 'eth1'], stdout=PIPE)
out, err = eth1.communicate()
for line in out.split('
'):
    line = line.lstrip()
    if line.startswith('inet addr:'):
        ip = line.split()[1][5:]

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