code: def __len__(self):
      return shapely.get_num_interior_rings(self._parent)
  
imports: import numpy
  import shapely
  from shapely.algorithms.cga import is_ccw_impl, signed_area
  from shapely.errors import TopologicalError
  from shapely.geometry.base import BaseGeometry
  from shapely.geometry.linestring import LineString
  from shapely.geometry.point import Point
label_desc: Use image node_id 4 for calling the InteriorRingSequence obj's underlying member method code with example usage: obj.__len__() and returns: shapely