def update_by_id(id,graph,**kwargs):

    """

    更新节点的属性

    根据节点的ID来更新节点的属性，如果存在该属性，则更新，如果不存在该属性，则添加

    """

    if graph is None:

        graph = get_graph()

    if kwargs is None:

        return None

    match = "match (x) where id(x)=%s " % (id)

    fields_str=''

    for k,v in kwargs:

        if v is not None:

            temp = " set x.%s = '%s' " % (k,v)

            fields_str += temp

    match = match + fields_str

    match = match + " return id(x) as x_id"

    result = graph.run(match).data()

    if result is not None and len(result > 0):

        id = result[0]["x_id"]

        return id

    return None