code: def quantize_int8_helper(data):
      min_data = mx.nd.min(data)
      max_data = mx.nd.max(data)
      return mx.nd.contrib.quantize(
          data, min_data, max_data, out_type="int8"
      )
  
imports: import time
  import mxnet
  from mxnet.test_utils import check_speed
label_desc: Use image node_id 1 for calling a global function with example usage: quantize_int8_helper(data) and returns: mx