def __call__()

in awscli/clidriver.py [0:0]

• 50 lines of code
• 6 McCabe index (conditional complexity)

    def __call__(self, args, parsed_globals):
        # Once we know we're trying to call a particular operation
        # of a service we can go ahead and load the parameters.
        event = (
            'before-building-argument-table-parser.'
            f'{self._parent_name}.{self._name}'
        )
        self._emit(
            event,
            argument_table=self.arg_table,
            args=args,
            session=self._session,
            parsed_globals=parsed_globals,
        )
        operation_parser = self._create_operation_parser(self.arg_table)
        self._add_help(operation_parser)
        parsed_args, remaining = operation_parser.parse_known_args(args)
        if parsed_args.help == 'help':
            op_help = self.create_help_command()
            return op_help(remaining, parsed_globals)
        elif parsed_args.help:
            remaining.append(parsed_args.help)
        if remaining:
            raise UnknownArgumentError(
                f"Unknown options: {', '.join(remaining)}"
            )
        event = f'operation-args-parsed.{self._parent_name}.{self._name}'
        self._emit(
            event, parsed_args=parsed_args, parsed_globals=parsed_globals
        )
        call_parameters = self._build_call_parameters(
            parsed_args, self.arg_table
        )

        event = f'calling-command.{self._parent_name}.{self._name}'
        override = self._emit_first_non_none_response(
            event,
            call_parameters=call_parameters,
            parsed_args=parsed_args,
            parsed_globals=parsed_globals,
        )
        # There are two possible values for override. It can be some type
        # of exception that will be raised if detected or it can represent
        # the desired return code. Note that a return code of 0 represents
        # a success.
        if override is not None:
            if isinstance(override, Exception):
                # If the override value provided back is an exception then
                # raise the exception
                raise override
            else:
                # This is the value usually returned by the ``invoke()``
                # method of the operation caller. It represents the return
                # code of the operation.
                return override
        else:
            # No override value was supplied.
            return self._operation_caller.invoke(
                self._operation_model.service_model.service_name,
                self._operation_model.name,
                call_parameters,
                parsed_globals,
            )