code: def test_shape_dtype_repr(self):
      sd = ShapeDtype((2, 3))
      repr_string = "{}".format(sd)
      self.assertEqual(
          repr_string,
          "ShapeDtype{shape:(2, 3), dtype:<class 'numpy.float32'>}",
      )
  
file_path: trax/trax/shapes_test.py
imports: from absl.testing import absltest
  import numpy
  from trax import shapes
  from trax.shapes import ShapeDtype
label_desc: Use image node_id 4 for calling the ShapesTest obj's underlying member method code with example usage: obj.test_shape_dtype_repr() without return types