python - 如何在 python 脚本上运行高级 Linux 命令

Question

我想得到以下linux命令的字符串输出

systemctl show node_exporter |grep LoadState| awk '{split($0,a,"="); print a[2]}'

我试过了

import subprocess
output = subprocess.check_output("systemctl show node_exporter |grep LoadState| awk '{split($0,a,"="); print a[2]}'", shell=True)

但输出是， output = subprocess.check_output("systemctl show node_exporter |grep LoadState| awk '{split($0,a,"="); print a[2]}'", shell=True) SyntaxError: keyword can不是表达

标签： pythonsystemctl

Answer 1

您需要转义双引号（因为它们指示字符串的开始/结束）：

import subprocess
output = subprocess.check_output("systemctl show node_exporter |grep LoadState| awk '{split($0,a,\"=\"); print a[2]}'", shell=True)