code: def get_symbol_embedding():
      embedding = eval(config.net_name).get_symbol()
      all_label = mx.symbol.Variable("softmax_label")
      all_label = mx.symbol.BlockGrad(all_label)
      out_list = [embedding, all_label]
      out = mx.symbol.Group(out_list)
      return out, embedding
  
imports: import argparse
  import logging
  import os
  import sys
  import time
  import horovod.mxnet
  import mxnet
  import default
  from callbacks import CallBackModelSave, CallBackLogging, CallBackCenterSave, CallBackVertification
  from default import config
  from image_iter import FaceImageIter, DummyIter
  from memory_module import SampleDistributeModule
  from memory_bank import MemoryBank
  from memory_scheduler import get_scheduler
  from memory_softmax import MarginLoss
  from optimizer import MemoryBankSGDOptimizer
  from symbol import resnet
label_desc: Use image node_id 3 for calling a global function with example usage: get_symbol_embedding() and returns: out,  embedding