问题描述
我需要在subprocess.Popen中运行一个shell命令.
I need to run a shell command inside subprocess.Popen in Python.
命令是:$ virsh dumpxml服务器1 | grep源文件" | awk -F \''{print $ 2}'
The command is:$ virsh dumpxml server1 | grep 'source file' | awk -F\' '{print $2}'
输出为:/vms/onion.qcow2
The output is:/vms/onion.qcow2
上述命令给我带来了两个挑战:
I'm having two challenges with the above command:
1)该命令位于循环内,在看到"server1"的地方,它是一个具有服务器名称的变量.
1) The command is inside a loop, and where you see 'server1', it is a variable that will have a server name.
2)Python在抱怨KeyError:'print $ 2'
2) Python is complaining about KeyError: 'print $2'
这是我到目前为止所拥有的:
Here is what I have so far:
proc = subprocess.Popen(["virsh dumpxml {0} | grep 'source file' | awk -F\' '{print $2}'".format(vm)], stdout=subprocess.PIPE, shell=True)
stdout = proc.communicate()[0]
谢谢.
推荐答案
虽然可以直接从python使用libvirt,但是您的问题是{
是格式字符串,并且在awk
脚本中将print $2
括起来好吧,所以您必须避开像这样的大括号
While it's possible use libvirt directly from python, your problem is that {
is the format string, and surrounds print $2
in your awk
script as well, so you have to escape those braces like
proc = subprocess.Popen(["virsh dumpxml {0} | grep 'source file' | awk -F\\' '{{print $2}}'".format(vm)], stdout=subprocess.PIPE, shell=True)
stdout = proc.communicate()[0]
这篇关于如何在subprocess.Popen中的Python中运行awk -F \''{print $ 2}'?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!