Python script to scan task list and launch missing background tasks

launcher.py

"""
launcher.py - scan running tasks and launch as needed.  Useful on Windows where
cygwin's ps isn't informative and procps may be unavailable.

Terry N. Brown, [email protected], Mon Jan 30 09:20:30 2017
"""

import sys
from subprocess import Popen, PIPE

import psutil

targets = {
    'winbut': "python d:/local/winbut.py",
    'report_reminder': "python d:/local/report_reminder.py",
}

for pid in psutil.pids():
    
    try:
        proc = psutil.Process(pid)
    except psutil.NoSuchProcess:
        continue
    
    if 'python' not in proc.name():
        continue       

    targets = {
        k:v for k,v in targets.items()
        if k not in ' '.join(proc.cmdline())
    }

    if not targets:
        break

for target, prog in targets.items():
    print(prog)
    cmd = prog.split()
    CREATE_NEW_PROCESS_GROUP = 0x00000200
    DETACHED_PROCESS = 0x00000008
    Popen(
        cmd, # stdin=PIPE, stdout=PIPE, stderr=PIPE,
        stdout=sys.stdout, stderr=sys.stderr,
        creationflags=DETACHED_PROCESS | CREATE_NEW_PROCESS_GROUP
    )