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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 _indices(self):
 """Find the path_index and node_index that identify the given node."""

        path = self.parent
        layer = path.parent
        for path_index in range(len(layer.paths)):
            if path == layer.paths[path_index]:
                for node_index in range(len(path.nodes)):
                    if self == path.nodes[node_index]:
                        return Point(path_index, node_index)
        return None