mash/main.py

import os
import subprocess
import re

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

def grabArgument(fullCommand, commandRan):
    fullCommand.replace(commandRan, "")

while True:
    command = input(currentDirectory + " > ")
    if command == "pwd":
        print(currentDirectory)
    elif command == ("cat"):
        try:
            
            catFile = input("File to catalog: ")
            catFileOpened = open(catFile)
            print(catFileOpened.read())
        except Exception:
            print("File", catFile, "either doesn't exist or isn't in this directory.")
    elif command == "version":
        print(version)
    else:
        subprocess.run(command)