sends a report of running process on servers

check_process.py

import sys
import subprocess
import smtplib

from email.mime.text import MIMEText
from threading import Thread

FROM = ""
TO = ""
SMTP_SERVER = "localhost"

def check_process_on_server(server, process, results, idx):
    command = "ps -ef | grep %s | grep -v grep" % process
    results[idx] = "server %s\r\t%s\n" % (server, subprocess.check_output('ssh %s "%s"' % (server, command), shell=True))

def check_process(process, servers):
    threads = [None] * len(servers)
    results = [None] * len(servers)
    t = 0
    for server in servers:
        threads[t] = Thread(target=check_process_on_server, args=(server, process, results, t))
        threads[t].start()
        t = t + 1
    for i in range(len(threads)):
        threads[i].join()
    return "\n".join(results)

def send_report(report):
    msg = MIMEText(report)
    msg['Subject'] = 'The contents of %s' % textfile
    msg['From'] = FROM
    msg['To'] = TO

    s = smtplib.SMTP(SMTP_SERVER)
    s.sendmail(FROM, [TO], msg.as_string())
    s.quit()

if __name__ == "__main__":
    if len(sys.argv) < 3:
        sys.exit("usage: %s <process> <host_list>" % sys.argv[0])
    send_report(check_process(sys.argv[1], sys.argv[2:]))