NameError: name 'device' is not defined in predict() method

[fmikaelian]

---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
<ipython-input-14-65cedbb88ef8> in <module>()
      2 test_examples, test_features = test_processor.fit_transform(X=squad_examples)
      3 # model = load('model.joblib')
----> 4 predictions = model.predict(X=(test_examples, test_features))

~/cdQA/cdqa/reader/bertqa_sklearn.py in predict(self, X)
   1037             if len(all_results) % 1000 == 0:
   1038                 logger.info("Processing example: %d" % (len(all_results)))
-> 1039             input_ids = input_ids.to(device)
   1040             input_mask = input_mask.to(device)
   1041             segment_ids = segment_ids.to(device)

NameError: name 'device' is not defined

[Aisha5]

Hello
I have written the following code:

validate on val set

predictions = model.predict(X_val_prep)
predictions = [1 if x>0.5 else 0 for x in predictions]

accuracy = accuracy_score(y_val, predictions)
print('Val Accuracy = %.2f' % accuracy)

confusion_mtx = confusion_matrix(y_val, predictions)
cm = plot_confusion_matrix(confusion_mtx, classes = list(labels.items()), normalize=False)

NameError: name 'X_val_prep' is not defined

Could you help me how I should tackle it?
thank u very much.