Test your knowledge: argparse

Review

1. Which declaration defines a required positional argument named path?

   A positional name has no leading dashes and is required by default.
2. What does type=int do for an argument?

   Command-line tokens arrive as strings; type=int performs conversion and lets argparse report invalid input.
3. Without --verbose, what is args.verbose when registered with action="store_true"?

   The store_true action defaults to False and stores True when the flag is supplied.
4. What does add_mutually_exclusive_group() enforce by default?

   The group defines conflicting options; supplying more than one causes a parser error.
5. What is a main reason to use subparsers?

   Subparsers support command families such as add/list/remove with separate command-specific options.
6. Why is main(argv=None) a useful pattern?

   Tests can pass an explicit sequence; normal execution passes None so argparse reads the process command line.