python - 如何使用py2neo在neo4j中将列表列表加载为字符串

Question

我有示例 param_list-

param_list = [{
    "labels" : ["test"],
    "properties" : {"some_list" : "[['sample', 'testing']]"}
}]

并有密码模板-

cypher_template = """UNWIND $batch as row
CALL apoc.create.node(row.labels, row.properties) yield node
RETURN count(*)"""

result = graph.run(cypher_template, {"batch" : cypher_list})

for i in result:
    print (i)

当我运行 cypher 语句时，出现以下错误：

py2neo.database.ClientError: ProcedureCallFailed: Failed to invoke procedure `apoc.create.node`: Caused by: java.lang.IllegalArgumentException: [[Ljava.util.ArrayList;@125e2edb:[Ljava.util.ArrayList;] is not a supported property value

即使我将属性值作为字符串类型，我仍然会收到此错误消息，指出不支持列表列表。

py2neo == 4.3.0 neo4j == 4.0.0

Answer 1

Neo4j 不支持作为列表列表的属性值。

尝试更改[['sample', 'testing']]为['sample', 'testing'].