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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def convert_roipooling(node, **kwargs):
 """Map MXNet's ROIPooling operator attributes to onnx's MaxRoiPool operator and return the created node. """

    name, input_nodes, attrs = get_inputs(node, kwargs)

    pooled_shape = convert_string_to_list(attrs.get('pooled_size'))
    scale = float(attrs.get("spatial_scale"))

    node = onnx.helper.make_node(
        'MaxRoiPool',
        input_nodes,
        [name],
        pooled_shape=pooled_shape,
        spatial_scale=scale,
        name=name
    )
    return [node]