code: def contains_empty(features):
      
      if not features:
          return True
      for feature in features:
          if feature.shape[0] == 0:
              return True
      return False
docs: Check features data are not empty
  
      :param features: The features data to check.
      :type features: list of numpy arrays.
  
      :return: True if one of the array is empty, False else.