gen_add_onnx.py

import onnx
from onnx import helper
from onnx import AttributeProto, TensorProto, GraphProto

# Create one input (ValueInfoProto)
X1 = helper.make_tensor_value_info("X1", TensorProto.FLOAT, [3, 2])
X2 = helper.make_tensor_value_info("X2", TensorProto.FLOAT, [3, 2])

# Create one output (ValueInfoProto)
Y = helper.make_tensor_value_info("Y", TensorProto.FLOAT, [3, 2])

# Create a node (NodeProto) - This is based on Pad-11
node_def = helper.make_node(
    "Add",  # node name
    ["X1", "X2"],  # inputs
    ["Y"],  # outputs
)

# Create the graph (GraphProto)
graph_def = helper.make_graph(
    [node_def],
    "test-model",
    [X1, X2],
    [Y],
)

# Create the model (ModelProto)
model_def = helper.make_model(graph_def, producer_name="onnx-example")

print("The model is:\n{}".format(model_def))
onnx.checker.check_model(model_def)
onnx.save(model_def, "add.onnx")
print("The model is checked!")