shell.py

#!/usr/bin/env python3
# Foundations of Python Network Programming, Third Edition
# https://github.com/brandon-rhodes/fopnp/blob/m/py3/chapter16/shell.py
# A simple shell, so you can try running commands at a prompt where no
# characters are special (except that whitespace separates arguments).

import subprocess

def main():
    while True:
        args = input('] ').strip().split()
        if not args:
            pass
        elif args == ['exit']:
            break
        elif args[0] == 'show':
            print("Arguments:", args[1:])
        else:
            try:
                subprocess.call(args)
            except Exception as e:
                print(e)

if __name__ == '__main__':
    main()