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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 insert_node_node(**kw):
 """ Link a node to another node. node_id -> target_node_id. Where `node_id` is the parent and `target_node_id` is the child. """

    with current_app.app_context():
        insert_query(name='select_link_node_from_node.sql', node_id=kw.get('node_id'))
        db.execute(text(fetch_query_string('insert_node_node.sql')), **kw)