網路式資料庫應用 (neo4j)

應用場景：

(1) 建立一個新網路式資料庫

(2) 建立節點及其屬性

(3) 建立節點間關係及其屬性

(4) 搜尋相關節點資料

(5) 刪除節點及其關係

(6) 關閉資料庫

程式碼：

# -*- coding: utf-8 -*- from neo4j import GraphDatabase # Create a database db = GraphDatabase("/home/richclee/Neo4J") # All write operations happen in a transaction with db.transaction: rootNode = db.node(name='Alice', age=38) node2 = db.node(name='Bob', age=56) node3 = db.node(name='Jack', age=45) # Create a relationship with type 'knows' nodeR2 = rootNode.relationships.create('Knows', node2, name='R2', strong=20) nodeR3 = rootNode.relationships.create('Knows', node3, name='R3', strong=14) traverser = db.traversal() \ .relationships('Knows') \ .traverse(rootNode) for relationship in traverser.relationships: startNode = relationship.getStartNode() endNode = relationship.getEndNode() message = "%s:%d %s:%d %s:%d" % ( \ startNode['name'], startNode['age'], \ relationship['name'], relationship['strong'], \ endNode['name'], endNode['age']) print message pass # Delete the data with db.transaction: nodeR2.delete() nodeR3.delete() rootNode.delete() node2.delete() node3.delete() # Always shut down your database when your application exits db.shutdown()

結果輸出：

Alice:38 Knows:20 Bob:56 Alice:38 Knows:14 Jack:45