code: def do_normalize(arr):
      ret = arr.copy()
      idx = np.isclose(
          arr, -0, rtol=1.0e-3, atol=1.0e-3, equal_nan=True
      )
      ret[idx] = 0
      return ret
  
imports: from mxnet.test_utils import *
  from mxnet.base import MXNetError
  import pytest
  from common import assertRaises
  import random
  import warnings
label_desc: Use image node_id 14 for calling a global function with example usage: do_normalize(arr) and returns: ret