mash/main.py

import os
import subprocess

initDirectory = os.path.dirname(os.path.realpath(__file__)) 
currentDirectory = initDirectory
version = "0.0.1"

while True:
    command = input(currentDirectory + " > ")
    if command == "pwd":
        print(currentDirectory)
    elif command == "cat *":
        print("You ran cat")
    elif command == "version":
        print(version)
    else:
        subprocess.run(command)