python与neo-4j交互(对py2neo包做的笔记)

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graph_1 = Graph()graph_2 = Graph(host="localhost")graph_3 = Graph("http://localhost:7474/db/data")

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graph.data("MATCH (a:Person) RETURN a.name, a.born LIMIT 4")

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DataFrame(graph.data("MATCH (a:Person) RETURN a.name, a.born LIMIT 4"))

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from py2neo import Graph, Node, Relationshipg = Graph()tx = g.begin()a = Node("Person", name="Alice")tx.create(a)b = Node("Person", name="Bob")ab = Relationship(a, "KNOWS", b)tx.create(ab)tx.commit()g.exists(ab)

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for rel in graph.match(start_node=alice,rel_type="FRIEND"): print(rel.end_node()['name'])

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from py2neo import Graphg = Graph()# evaluate()返回结果的第一个值g.run(""MATCH (a) WHERE a.email={x} RETURN a.name",x="bob@acme.com").evaluate()g.run(""MATCH (a) WHERE a.email={x} RETURN a.name",x="bob@acme.com").data()

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from py2neo import Graph,NodeSelectorgraph = Graph()selector = NodeSelector(graph)slected = selector.select("Person",name="Keanu Reeves")list(selected)selected = selector.select("Person").where("_.name =~ 'J.*'","1960 <= _.born < 1970")list(selected)

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# 删除所有的graph.delete_all()