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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def import_instance( self, name, input_config, retry=google.api_core.gapic_v1.method.DEFAULT, timeout=google.api_core.gapic_v1.method.DEFAULT, metadata=None, ):
 """ Import a Redis RDB snapshot file from GCS into a Redis instance. Redis may stop serving during this operation. Instance state will be IMPORTING for entire operation. When complete, the instance will contain only data from the imported file. The returned operation is automatically deleted after a few hours, so there is no need to call DeleteOperation. Example: Args: name (str):
 Required. Redis instance resource name using the form: ``projects/{project_id}/locations/{location_id}/instances/{instance_id}`` where ``location_id`` refers to a GCP region input_config (Union[dict, ~google.cloud.redis_v1.types.InputConfig]):
 Required. Specify data to be imported. If a dict is provided, it must be of the same form as the protobuf message :class:`~google.cloud.redis_v1.types.InputConfig` retry (Optional[google.api_core.retry.Retry]):
 A retry object used to retry requests. If ``None`` is specified, requests will not be retried. timeout (Optional[float]):
 The amount of time, in seconds, to wait for the request to complete. Note that if ``retry`` is specified, the timeout applies to each individual attempt. metadata (Optional[Sequence[Tuple[str, str]]]):
 Additional metadata that is provided to the method. Returns: A :class:`~google.cloud.redis_v1.types._OperationFuture` instance. Raises: google.api_core.exceptions.GoogleAPICallError: If the request failed for any reason. google.api_core.exceptions.RetryError: If the request failed due to a retryable error and retry attempts failed. ValueError: If the parameters are invalid. """

        # Wrap the transport method to add retry and timeout logic.
        if "import_instance" not in self._inner_api_calls:
            self._inner_api_calls[
                "import_instance"
            ] = google.api_core.gapic_v1.method.wrap_method(
                self.transport.import_instance,
                default_retry=self._method_configs["ImportInstance"].retry,
                default_timeout=self._method_configs["ImportInstance"].timeout,
                client_info=self._client_info,
            )

        request = cloud_redis_pb2.ImportInstanceRequest(
            name=name, input_config=input_config
        )
        operation = self._inner_api_calls["import_instance"](
            request, retry=retry, timeout=timeout, metadata=metadata
        )
        return google.api_core.operation.from_gapic(
            operation,
            self.transport._operations_client,
            cloud_redis_pb2.Instance,
            metadata_type=cloud_redis_pb2.OperationMetadata,
        )