code: def num_rel(self):
      return self.relation_emb.emb.shape[0]
  
imports: import os
  import numpy
  import math
  import dgl.backend
  import pdb
  import torch
  import torch.nn
  from .pytorch.tensor_models import logsigmoid
  from .pytorch.tensor_models import abs
  from .pytorch.tensor_models import masked_select
  from .pytorch.tensor_models import get_device, get_dev
  from .pytorch.tensor_models import norm
  from .pytorch.tensor_models import get_scalar
  from .pytorch.tensor_models import reshape
  from .pytorch.tensor_models import cuda
  from .pytorch.tensor_models import ExternalEmbedding
  from .pytorch.tensor_models import InferEmbedding
  from .pytorch.score_fun import *
  from .pytorch.loss import LossGenerator
label_desc: Use image node_id 5 for calling the InferModel obj's underlying member method code with example usage: obj.num_rel() and returns: self