title: SyntaxError (amazon-sagemaker-object-has-no-attribute)
body: <p>I'm running the code cell below, on SageMaker Notebook instance.</p>
  <pre><code>pd.concat([train_data['y_yes'], train_data.drop(['y_no', 'y_yes'], axis=1)], axis=1).to_csv('train.csv', index=False, header=False)
  boto3.Session().resource('s3').Bucket(bucket_name).Object(os.path.join(prefix, 'train/train.csv')).upload_file('train.csv')
  s3_input_train = sagemaker.s3_input(s3_data='s3://{}/{}/train'.format(bucket_name, prefix), content_type='csv')
  </code></pre>
  <p>And if I hit, the following error is appearing:</p>
  <pre><code>AttributeError: 'SageMaker' object has no attribute 's3_input'
  </code></pre>