Question

I am using python 3.2 currently and I wanted to do write a code that generates 3 instances of command prompt in windows. I then need to access a different server in each of these command prompts using Plink (putty) and run a time consuming program in each of these command prompts in parallel. While I was able to create three instances of command prompts, I was not able to send commands to these prompts. Is there any method to do so? Should I use multiprocessing/ multithreading for this purpose?

I wrote the following code for creating the command prompts. Is there any way to pass commands to each of these prompts?

def Plink():
    name = multiprocessing.current_process().name
    proc = subprocess.Popen("C:\\Windows\\System32\\cmd.exe")

if __name__ == '__main__':
    Plink_1 = multiprocessing.Process(name='Plink 1', target=Plink)
    Plink_2 = multiprocessing.Process(name='Plink 2', target=Plink)
    Plink_3 = multiprocessing.Process(name='Plink 3', target=Plink)

    Plink_1.start()
    Plink_2.start()
    Plink_3.start()

Answer 1

Um, what?

import subprocess
def make_shells(n):
    for i in range(n):
         subprocess.Popen(["cmd.exe"])

What you want to do isn’t what is generally referred to as “multi-processing”…

Using Paramiko

Here’s how you can use paramiko to connect to a remote SSH server and run a command.

import paramiko
def run_ls_la():
    client = paramiko.SSHClient()
    client.connect("myssh.server.org", username="foo", password="bar")
    stdin, stdout, stderr = client.exec_command("ls -la")
    print(stdout.read())

You can also have it use public key auth, check the docs.