text: 
  def is_unique_points(points=None):
      if points is None:
          points = {}
      points_dict = {}
      for key, values in points.items():
          new_key = '%s:%s' % tuple(values)
          is_exists = points_dict.get(new_key, None)
          if is_exists:
              return False
          else:
              points_dict[new_key] = key
  
      return True
  