使用Python与neo4j交互

from neo4j.v1 import GraphDatabase, basic_auth

driver = GraphDatabase.driver("bolt://localhost", auth=basic_auth("neo4j", "your password"))

session = driver.session()

# Insert data

insert_query = '''

UNWIND {pairs} as pair

MERGE (p1:Person {name:pair[0]})

MERGE (p2:Person {name:pair[1]})

MERGE (p1)-[:KNOWS]-(p2);

'''

data = [["Jim","Mike"],["Jim","Billy"],["Anna","Jim"],

["Anna","Mike"],["Sally","Anna"],["Joe","Sally"],

["Joe","Bob"],["Bob","Sally"]]

session.run(insert_query, parameters={"pairs": data})

# Friends of a friend

foaf_query = '''

MATCH (person:Person)-[:KNOWS]-(friend)-[:KNOWS]-(foaf)

WHERE person.name = {name}

AND NOT (person)-[:KNOWS]-(foaf)

RETURN foaf.name AS name

'''

print 1

results = session.run(foaf_query, parameters={"name": "Joe"})

for record in results:

print(record["name"])

# Common friends

common_friends_query = """

MATCH (user:Person)-[:KNOWS]-(friend)-[:KNOWS]-(foaf:Person)

WHERE user.name = {user} AND foaf.name = {foaf}

RETURN friend.name AS friend

"""

print 2

results = session.run(common_friends_query, parameters={"user": "Joe", "foaf": "Sally"})

for record in results:

print(record["friend"])

# Connecting paths

connecting_paths_query = """

MATCH path = shortestPath((p1:Person)-[:KNOWS*..6]-(p2:Person))

WHERE p1.name = {name1} AND p2.name = {name2}

RETURN path

"""

print 3

results = session.run(connecting_paths_query, parameters={"name1": "Joe", "name2": "Billy"})

for record in results:

print (record["path"])

session.close()

输出

1Anna2Bob3

在交互界面输入

MATCH p=()-[r:KNOWS]->() RETURN p LIMIT 25