python与neo-4j交互(对py2neo包做的笔记)

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

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

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

from py2neo import Graph, Node, Relationship
g = 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)

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

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

from py2neo import Graph,NodeSelector
graph = 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)

# 删除所有的
graph.delete_all()