code: def get_low_high(qtype):
      """Return low and high value for given integer type as float number"""
      if qtype == "uint8":
          return 0.0, 255.0
      else:
          return -128.0, 127.0
  
imports: import os
  import mxnet
  import numpy
  from mxnet import npx
  from mxnet.util import use_np
  from mxnet.gluon.model_zoo import vision
  from mxnet.test_utils import assert_almost_equal, assert_exception, rand_ndarray, rand_shape_nd, same, DummyIter
  from common import xfail_when_nonstandard_decimal_separator
  from mxnet.io import NDArrayIter
  import unittest
  import operator
label_desc: Use image node_id 5 for calling a global function with example usage: get_low_high(qtype) and returns: int,  int, unknown,  int