q.py aka. My First Python Script!

q.py

#!/usr/bin/python3
from filelock import Timeout, FileLock
from time import sleep
from sys import argv
from os import getpid
import argparse
import subprocess

path = "/tmp/.qpy_lock"
lock = FileLock( path, timeout=12 )

def cmd(var):
    process = subprocess.Popen(
        var, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)

    # Wait for the command execution to finish.
    process.wait()

    out, err = process.communicate()
    if out:
        out = out.decode('utf-8')
        print( out )
    if err:
        err = err.decode('utf-8')
        print( '!> ' + err )
    
    exit()

if argv and len( argv ) > 1:
    for k, v in enumerate( argv ):
        if ' ' in v:
            argv[k] = "\"" + v + "\""

    _input = ( " " ).join( argv[1:] )

    while True:
        try:
            with lock.acquire():
                print( "> " + _input )
                cmd( _input )
                break
        except Timeout:
            print( "!> Request Timed out for " + str( getpid() ) )
            break
        sleep(1)
else:
    print( "!> Please enter a command to queue..." )