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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 route_level(root, level):
 """ Helper method to recurse the current node and return the specified routing node level. """

    def recurse(nodes):
        for node in nodes:
            if node.level == level:
                routing_node.append(node)
            else:
                recurse(node)

    routing_node = []
    recurse(root)
    return routing_node