code: def test_np_str_dtype():
      a = np.array(["foo"])
      serde.decode(serde.encode(a.dtype)) == a.dtype
  
imports: from functools import partial
  from operator import add
  from pathlib import Path
  from typing import NamedTuple
  import numpy
  import pandas
  import pytest
  from gluonts.core.component import equals, equals_list
  from gluonts.core import serde
label_desc: Use image node_id 8 for calling a global function with example usage: test_np_str_dtype() without return types