python - 将 os.system() 输出重定向到 .txt 文件

Question

我是 Python 新手。我有 Unix 命令列表 ("uname -a","uptime","df -h","ifconfig -a","chkconfig --list","netstat -rn","cat/proc/meminfo","ls -l/dev") 我想运行它们并将整个输出重定向到 .txt 文件。我搜索了很多但没有找到合适的解决方案，或者我理解错误。

我可以使用这个 for 循环在 stdout 上获取输出，但我无法重定向到文件。

def commandsoutput():
    command = ("uname -a","uptime","df -h","ifconfig -a","chkconfig --list","netstat -rn","cat /proc/meminfo","ls -l /dev")

    for i in command:
        print (os.system(i))

commandsoutput()

Answer 1

os.system 返回命令的退出代码，而不是它的输出。它也被弃用了。

改用subprocess:

import subprocess

def commandsoutput():
     command = ("uname -a","uptime","df -h","ifconfig -a","chkconfig --list","netstat -rn","cat /proc/meminfo","ls -l /dev")

     with open('log.txt', 'a') as outfile:
         for i in command:
              subprocess.call(i, stdout=outfile)

commandsoutput()