code: def _setup_argparse(self):
          
          parser = argparse.ArgumentParser(
              prog='catalog', description='Parent Catalog class for astrocats.')
  
          subparsers = parser.add_subparsers(
              description='valid subcommands', dest='subcommand')
  
          # Data Import
          # -----------
          # Add the 'import' command, and related arguments
          self._add_parser_arguments_import(subparsers)
  
          # Git Subcommands
          # ---------------
          self._add_parser_arguments_git(subparsers)
  
          # Analyze Catalogs
          # ----------------
          # Add the 'analyze' command, and related arguments
          self._add_parser_arguments_analyze(subparsers)
  
          return parser
docs: Create `argparse` instance, and setup with appropriate parameters.