code: def operator_string(elemwise_add):
      return "elemwise_add" if elemwise_add else "npi_add"
  
imports: import time
  import gc
  import sys
  import mxnet
  from mxnet.gluon import nn
  from mxnet.contrib import quantization
label_desc: Use image node_id 2 for calling a global function with example usage: operator_string(elemwise_add) and returns: unknown