py2neo使用

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python3使用neo4j：py2neo v4

https://py2neo.org/v4/

https://github.com/technige/py2neo

安装pip3 install py2neo

简单使用：

>>> from py2neo import *

>>> graph = Graph(password='hello')

>>> graph.run("MATCH (a:Person) RETURN a.name, a.born LIMIT 4").to_data_frame()

   a.born              a.name

0     NaN                 Ian

1  1964.0        Keanu Reeves

2  1967.0    Carrie-Anne Moss

3  1961.0  Laurence Fishburne

>>> matcher = NodeMatcher(graph)
>>> list(matcher.match("Person").where("_.name =~ 'K.*'"))
[(_21:Person {born: 1964, name: 'Keanu Reeves'}), (_39:Person {born: 1958, name: 'Kevin Bacon'}), (_40:Person {born: 1966, name: 'Kiefer Sutherland'}), (_43:Person {born: 1957, name: 'Kevin Pollak'}), (_50:Person {born: 1957, name: 'Kelly McGillis'}), (_59:Person {born: 1962, name: 'Kelly Preston'})]
 

>>> import pandas as pd
>>> pd.set_option('display.max_colwidth',500)
>>> graph.run('MATCH p=shortestPath((bacon:Person {name:"Kevin Bacon"})-[*]-(meg:Person {name:"Meg Ryan"}))RETURN p').to_data_frame()
                                                                                                                 p
0  ({'roles': ['Jack Swigert']}, {'roles': ['Jim Lovell']}, {'roles': ['Sam Baldwin']}, {'roles': ['Annie Reed']})