utils/check_tf_ops.py/onnx_compliancy
def onnx_compliancy(saved_model_path, strict, opset):
    saved_model = SavedModel()
    onnx_ops = []

    with open(os.path.join(REPO_PATH, "utils", "tf_ops", "onnx.json")) as f:
        onnx_opsets = json.load(f)["opsets"]

    for i in range(1, opset + 1):
        onnx_ops.extend(onnx_opsets[str(i)])

    with open(saved_model_path, "rb") as f:
        saved_model.ParseFromString(f.read())

    model_op_names = set()

    # Iterate over every metagraph in case there is more than one (a saved model can contain multiple graphs)
    for meta_graph in saved_model.meta_graphs:
        # Add operations in the graph definition
        model_op_names.update(node.op for node in meta_graph.graph_def.node)

        # Go through the functions in the graph definition
        for func in meta_graph.graph_def.library.function:
            # Add operations in each function
            model_op_names.update(node.op for node in func.node_def)

    # Convert to list, sorted if you want
    model_op_names = sorted(model_op_names)
    incompatible_ops = []

    for op in model_op_names:
        if op not in onnx_ops and op not in INTERNAL_OPS:
            incompatible_ops.append(op)

    if strict and len(incompatible_ops) > 0:
        raise Exception(f"Found the following incompatible ops for the opset {opset}:\n" + incompatible_ops)
    elif len(incompatible_ops) > 0:
        print(f"Found the following incompatible ops for the opset {opset}:")
        print(*incompatible_ops, sep="\n")
    else:
        print(f"The saved model {saved_model_path} can properly be converted with ONNX.")