code: def export_elu_default() -> None:
      default_alpha = 1.0
      node = onnx.helper.make_node(
          "Elu",
          inputs=["x"],
          outputs=["y"],
      )
      x = np.random.randn(3, 4, 5).astype(np.float32)
      y = (
          np.clip(x, 0, np.inf)
          + (np.exp(np.clip(x, -np.inf, 0)) - 1) * default_alpha
      )
      expect(node, inputs=[x], outputs=[y], name="test_elu_default")
  
file_path: onnx/onnx/backend/test/case/node/elu.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 Elu obj's underlying member method code with example usage: obj.export_elu_default() without return types