问Neo4j Py2neo不更新节点属性

EN

    import py2neo
    import py2neo.ogm

    from py2neo import Graph
    from py2neo.ogm import GraphObject, Property

    class Movie(GraphObject):
        __primarykey__ = "title"

        title = Property()
        released = Property()

    def authenticateAndConnect():
        py2neo.authenticate('localhost:7474', 'user', 'password')
        return Graph('http://localhost:7474/default.graphdb/data/')     

    def foo():
        graph = authenticateAndConnect()
        movie = Movie.select(graph).where("_.title = 'The Matrix Reloaded'").first()
        movie.released = 2017
        graph.push(movie)

    if __name__ == '__main__':
        foo()