code: def test_isinstance():
      assert m.isinstance_untyped(np.array([1, 2, 3]), "not an array")
      assert m.isinstance_typed(np.array([1.0, 2.0, 3.0]))
  
imports: import pytest
  import env
  from pybind11_tests import numpy_array
label_desc: Use image node_id 17 for calling a global function with example usage: test_isinstance() without return types