code: def test_array_creation(self, func_name, args, kwargs):
      gs_fnc = get_backend_fnc(func_name)
  
      for dtype_str in self.dtypes_str:
          dtype = gs.set_default_dtype(dtype_str)
          out = gs_fnc(*args, **kwargs)
          self.assertDtype(out.dtype, dtype)
  
imports: import random
  import numpy
  import pytest
  import scipy
  import geomstats.backend
  from geomstats.test.test_case import TestCase
  from geomstats.test.vectorization import generate_vectorization_data
label_desc: Use image node_id 4 for calling the DtypeTestCase obj's underlying member method code with example usage: obj.test_array_creation(func_name, args, kwargs) without return types