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79 lines
3.3 KiB
79 lines
3.3 KiB
from neo4j import GraphDatabase
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from enum import Enum
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class RelationshipType(Enum):
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PREREQUISITE = "PREREQUISITE" # 先修知识
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PART_OF = "PART_OF" # 属于/包含
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IS_A = "IS_A" # 子类
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RELATED_TO = "RELATED_TO" # 相关
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TESTS = "TESTS" # 考察
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REQUIRES_SKILL = "REQUIRES_SKILL" # 需要能力
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ASSESSES_SKILL = "ASSESSES_SKILL" # 评估能力
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MASTERY = "MASTERY" # 掌握程度
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class KnowledgeGraphBuilder:
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def __init__(self, uri, user, password):
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self._driver = GraphDatabase.driver(uri, auth=(user, password))
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def close(self):
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self._driver.close()
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def clear_database(self):
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with self._driver.session() as session:
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session.run("MATCH (n) DETACH DELETE n")
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def create_concept_node(self, name, description, node_type="Concept"):
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with self._driver.session() as session:
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session.run(
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"MERGE (n:{} {{name: $name}}) "
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"SET n.description = $description".format(node_type),
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name=name, description=description
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)
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def create_relationship(self, from_node, to_node, rel_type, properties=None):
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with self._driver.session() as session:
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query = (
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"MATCH (a {{name: $from_name}}), (b {{name: $to_name}}) "
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"MERGE (a)-[r:{}]->(b)".format(rel_type.value)
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)
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if properties:
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query += " SET r += $properties"
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session.run(query,
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from_name=from_node,
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to_name=to_node,
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properties=properties or {})
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def build_math_knowledge_graph(self):
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# 清空数据库
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self.clear_database()
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# 创建核心概念节点
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self.create_concept_node("数的认识", "数的基本概念和分类")
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self.create_concept_node("数的运算", "基本数学运算原理")
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# 创建具体知识点节点
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self.create_concept_node("自然数", "表示物体个数的数")
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self.create_concept_node("加法意义", "加法的基本定义和含义")
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self.create_concept_node("加法运算", "加法计算方法")
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# 创建技能节点
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self.create_concept_node("数值计算", "进行数学计算的能力", "Skill")
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# 创建关系
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self.create_relationship("自然数", "数的认识", RelationshipType.PART_OF)
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self.create_relationship("加法意义", "加法运算", RelationshipType.PREREQUISITE)
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self.create_relationship("加法运算", "数值计算", RelationshipType.REQUIRES_SKILL)
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# 示例：创建题目节点和关系
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self.create_concept_node("题目1", "计算3+5的值", "Question")
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self.create_relationship("题目1", "加法运算", RelationshipType.TESTS)
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self.create_relationship("题目1", "数值计算", RelationshipType.ASSESSES_SKILL)
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if __name__ == "__main__":
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builder = KnowledgeGraphBuilder("bolt://localhost:7687", "neo4j", "DsideaL147258369")
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try:
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builder.build_math_knowledge_graph()
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print("知识图谱构建完成")
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finally:
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builder.close()
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