code: def test_default_float_dtype():
      import platform
  
      if "Windows" not in platform.system():
          check_default_dtype(_NUMPY_DTYPE_DEFAULT_FUNC_LIST)
  
imports: from __future__ import absolute_import
  import numpy
  import mxnet
  from mxnet import npx
  from mxnet import numpy
  from mxnet.test_utils import use_np, use_np_default_dtype
label_desc: Use image node_id 22 for calling a global function with example usage: test_default_float_dtype() without return types