code: def export_nd() -> None:
      node = onnx.helper.make_node(
          "Det",
          inputs=["x"],
          outputs=["y"],
      )
  
      x = np.array(
          [[[1, 2], [3, 4]], [[1, 2], [2, 1]], [[1, 3], [3, 1]]]
      ).astype(np.float32)
      y = np.linalg.det(x)  # expect array([-2., -3., -8.])
      expect(node, inputs=[x], outputs=[y], name="test_det_nd")
  
file_path: onnx/onnx/backend/test/case/node/det.py
imports: import numpy
  import onnx
  from onnx.backend.test.case.base import Base
  from onnx.backend.test.case.node import expect
label_desc: Use image node_id 2 for calling the Det obj's underlying member method code with example usage: obj.export_nd() without return types