title: AttributeError: keypoints - object detection using tensorflow 1.14
body: <p>I did custom object detection with tensorflow object detection api.
  I got this error when I ran the <code>object_detection_tutorial.ipynb</code> and I can't understand what to do.
  Anyone can help me to solve this problem?</p>
  
  <p>This is the error I got:</p>
  
  <pre><code>AttributeError                            Traceback (most recent call last)
  
  &lt;ipython-input-1-e2452dcef500&gt; in &lt;module&gt;
       41         tf.import_graph_def(od_graph_def, name='')
       42 
  ---&gt; 43 category_index = label_map_util.create_category_index_from_labelmap(path_to_labels, use_display_name=True)
       44 
       45 def run_inference_for_single_image(image, graph):
  
  C:\Users\Tal\Desktop\models\research\object_detection\utils\label_map_util.py in create_category_index_from_labelmap(label_map_path, use_display_name)
      313     {1: {'id': 1, 'name': 'dog'}, 2: {'id': 2, 'name': 'cat'}, ...}
      314   """
  --&gt; 315   categories = create_categories_from_labelmap(label_map_path, use_display_name)
      316   return create_category_index(categories)
      317 
  
  C:\Users\Tal\Desktop\models\research\object_detection\utils\label_map_util.py in create_categories_from_labelmap(label_map_path, use_display_name)
      296   max_num_classes = max(item.id for item in label_map.item)
      297   return convert_label_map_to_categories(label_map, max_num_classes,
  --&gt; 298                                          use_display_name)
      299 
      300 
  
  C:\Users\Tal\Desktop\models\research\object_detection\utils\label_map_util.py in convert_label_map_to_categories(label_map, max_num_classes, use_display_name)
      131       list_of_ids_already_added.append(item.id)
      132       category = {'id': item.id, 'name': name}
  --&gt; 133       if item.keypoints:
      134         keypoints = {}
      135         list_of_keypoint_ids = []
  
  AttributeError: keypoints
  </code></pre>