code: def export() -> None:
      node = onnx.helper.make_node(
          "Tanh",
          inputs=["x"],
          outputs=["y"],
      )
  
      x = np.array([-1, 0, 1]).astype(np.float32)
      y = np.tanh(x)  # expected output [-0.76159418, 0., 0.76159418]
      expect(node, inputs=[x], outputs=[y], name="test_tanh_example")
  
      x = np.random.randn(3, 4, 5).astype(np.float32)
      y = np.tanh(x)
      expect(node, inputs=[x], outputs=[y], name="test_tanh")
  
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 1 for calling the Tanh obj's underlying member method code with example usage: obj.export() without return types