使用py2neo创建多个关系

Question

我想使用py2neo库在同一节点之间创建多个关系。如果关系不存在，我使用create，并且当它存在时合并。以下是我的代码示例：

def create_route(graph, sourcefile, airport_nodes):
    with open(sourcefile, encoding="utf8") as csvfile:
        reader = csv.DictReader(csvfile)
        fieldnames = reader.fieldnames

        for row in reader:
            source_airport = row['origin']
            destination_airport = row['destination']
            source_airport_node = airport_nodes[source_airport]
            destination_airport_node = airport_nodes[destination_airport]
            node_properties = {'distance':row['distance']}
            node_properties1 = {'duration': row['duration']}
            graph.create(Relationship(source_airport_node, destination_airport_node,**node_properties1))
            graph.merge(Relationship(source_airport_node, destination_airport_node, **node_properties))

它与最后一个属性只有一个关系的问题是距离。

谢谢