如何使用 subprocess.popen

Question

Why do I get an error when I run subprocess.popen?

I load a command with arguments in a variable, I do a split and pass the result to subprocess.Popen. It returns an error .

Thank you all very much for your collaboration

The complete code is as follows:

#!/usr/bin/python3
# -*- coding: utf-8 -*-

import subprocess
import shlex


def main():
    try:
            data = "ls -al"
            args = shlex.split(data)
            comando = subprocess.Popen(args, shell=True,stdout=subprocess.PIPE,stderr=subprocess.PIPE)

            if comando.stderr.read() != "":
                print("[-] Error")
            else:
                print(comando.stdout.read())
    except Exception as e:
        print (e)

if __name__ == '__main__' :
    try:
        main()
    except KeyboardInterrupt:
        exit()

Answer 1

Use communicate

#!/usr/bin/python3
# -*- coding: utf-8 -*-

import subprocess
import shlex


def main():
    try:
            data = "ls -al"
            args = shlex.split(data)
            comando = subprocess.Popen(args, shell=True,stdout=subprocess.PIPE,stderr=subprocess.PIPE)
            comando_stdout, comando_stderr = comando.communicate()
            if comando_stderr:
                print("[-] Error")
            else:
                print(comando_stdout)
    except Exception as e:
        print (e)

if __name__ == '__main__' :
    try:
        main()
    except KeyboardInterrupt:
        exit()