Python - How to close a port left open?

Question

I have a process which at times is opening a port and then not closing it (I'm on Windows 10).

What is the best way to close this via Python? The port number is 1300 and will not change.

I know this can be done manually via command line by killing the PID, however I would like to keep it all in one easy to use batch file.

Answer 1

You can use the psutil module.

from psutil import process_iter
from signal import SIGKILL # Unix-only enum

for proc in process_iter():
    for conn in proc.net_connections(kind='inet'):
        if conn.laddr[1] == 1300:
            proc.send_signal(SIGKILL) 
            continue

Otherwise, you should just call kill from subprocess.