code: def test_stack_batchify(odtype, idtype, pass_dtype):
      dat = [
          np.random.randint(5, size=(10,)).astype(idtype)
          for _ in range(10)
      ]
      batchify_fn = batchify.Stack(dtype=odtype if pass_dtype else None)
      batchify_out = batchify_fn(dat).asnumpy()
      npy_out = np.array(dat)
      assert_allclose(batchify_out, npy_out)
      assert (
          batchify_out.dtype == npy_out.dtype
          if not pass_dtype
          else odtype
      )
  
file_path: gluon-nlp/tests/test_data_batchify.py
imports: import numpy
  from numpy.testing import assert_allclose
  from collections import namedtuple
  import mxnet
  from gluonnlp.data import batchify
  import pytest
label_desc: Use image node_id 5 for calling a global function with example usage: test_stack_batchify(odtype, idtype, pass_dtype) without return types