如何使用python子进程正确控制命令行程序？

Question

I have an external command line program I'd like to control via python. When using subprocess.open it continuously prints the first command in the terminal. I want to input a series of commands one after another and then terminate the program once it has finished running. I've tried several different method, but nothing seems to work. Can someone show me what I'm doing wrong, or help me fix my code? This is what I have:

from subprocess import Popen, PIPE
program_location = /Fortran/Program/Here/Program

file_location = /Place/For/Input/File/File.EXP
command_list = [file_location, 'expedt', 'y', 'y', 'x', 'powpref', 'genles']
p = Popen(program_location, stdin=PIPE)

for i in command_list:
    ps.stdin.write(i)

Answer 1

使用Popen.communicate将输入行发送到进程并等待它完成。

Answer 2

If you want all commands to run in parallel, you can run subprocess.call with the help of multiprocessing.

import subprocess
import multiprocessing

cmd_1 = ["timeout", "15", "ping", "google.com"]
cmd_2 = ["timeout", "15", "ping", "stackoverflow.com"]

cmds = [cmd_1, cmd_2]

for i in range(len(cmds)):
    p = multiprocessing.Process(target=subprocess.call, args=(cmds[i],))
    p.start()