code: def export() -> None:
      node = onnx.helper.make_node(
          "Softmax",
          inputs=["x"],
          outputs=["y"],
      )
      x = np.array([[-1, 0, 1]]).astype(np.float32)
      # expected output [[0.09003058, 0.24472848, 0.66524094]]
      y = softmax(x, axis=1)
      expect(node, inputs=[x], outputs=[y], name="test_softmax_example")
  
file_path: onnx/onnx/backend/test/case/node/softmax.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 1 for calling the Softmax obj's underlying member method code with example usage: obj.export() without return types