old_contents: #!/usr/bin/python3
  import sys
  
  print("MC Package Manager\n")
  if len(sys.argv) == 1:
  	print("Insufficient args\n")
  	exit()
  elif len(sys.argv) == 2:
  	pass
  else:
  	print("Too much args\n")
  
new_contents: #!/usr/bin/python3
  import sys
  
  print("MC Package Manager")
  if len(sys.argv) > 1 and len(sys.argv) < 5:
  	if sys.argv[1] == "install":
  		#iterating through mod list
  		print("Installing...")
  	elif sys.argv[1] == "update":
  		#look for changes in the package list
  		print("Updating...")
  	elif sys.argv[1] == "upgrade":
  		#upgrade installed mods
  		print("Upgrading...")
  	else:
  		print("No command found.")
  
subject: Add command function