class_docstr: Subclass of RectPartitioner, for 2D problems
code: def get_num_loc_cells(self):
      return [
          self.subd_hi_ix[0] - self.subd_lo_ix[0],
          self.subd_hi_ix[1] - self.subd_lo_ix[1],
      ]
  
imports: from numpy import ascontiguousarray, frombuffer, zeros
label_desc: Use image node_id 2 for calling the RectPartitioner2D obj's underlying member method code with example usage: obj.get_num_loc_cells() and returns: list