Programming Python Argparse: adding sub commands to your command line arguments September 28, 2016October 16, 2016 roshpr argparser, example, python, required, subcommand, subparsers Fatal error: Call to a member function id() on a non-object in /home/content/29/8089229/html/roshpr/blog/wp-content/plugins/crayon-syntax-highlighter/crayon_formatter.class.php on line 36