Simple Menu system for CLI written in Python

menu1.py

#!/usr/bin/env python3
# vim: filetype=python

# Simple #!/usr/bin/env python3
# vim: filetype=python

# Michael Longval
# mlongval@gmail.com

# Simple menuing system to execute scripts in $HOME/bin/menu1_items
# code portions courtesy https://pypi.org/project/simple-term-menu/
# (actually I did not ask the guy, I just copied some portions of his code 🤪 )

# I suggest putting at least one script call z_Quit in
# $HOME/bin/menu1_items
# The z_Quit file should be executable (eg chmod +x)
# and should simply contain:

# #!/bin/sh
# echo "Exiting"

# Doing it this way is a simple exit and also avoids crashes if
# menu1 is called and menu1_items is an empty directory.

import os
import subprocess
from simple_term_menu import TerminalMenu

# This has been tested on Linux and MacOS but NOT on Windows
HOME_DIR = os.getenv('HOME')
# this is where scripts go, change it to suit your needs
ITEMS_DIR = HOME_DIR + '/bin/menu1_items/'

# Comment this out if you don't want the screen cleared every time
subprocess.call('clear')

menu_title = 'Please select action: \n'

# if you don't want previews remove 'preview_command' from invocation
# of TerminalMenu below
preview = "cat " + ITEMS_DIR + "{}"

def list_files(directory=ITEMS_DIR):
    the_list = (list(file for file in os.listdir(directory)
                if os.path.isfile(os.path.join(directory, file))))
    the_list.sort()
    return the_list

def main():
    menu_items = list_files()
    if len(menu_items) != 0:
        terminal_menu = TerminalMenu(menu_items,
                        title=menu_title, preview_command=preview)
        item = ITEMS_DIR + menu_items[terminal_menu.show()]
        subprocess.call(item, shell=True)

if __name__ == "__main__":
    main()