This repository contains the official Neo4j driver for Python.
Driver upgrades within a major version will never contain breaking API changes.
For version compatibility with Neo4j server, please refer to: https://neo4j.com/developer/kb/neo4j-supported-versions/
To install the latest stable version, use:
Note
neo4j-driver is the old name for this package. It is now deprecated and and will receive no further updates starting with 6.0.0. Make sure to install neo4j as shown above.
You may want to have a look at the available Rust extensions for this driver for better performance. The Rust extensions are not installed by default. For more information, see neo4j-rust-ext.
from neo4j import GraphDatabase, RoutingControl
URI = "neo4j://localhost:7687"
AUTH = ("neo4j", "password")
def add_friend(driver, name, friend_name):
driver.execute_query(
"MERGE (a:Person {name: $name}) "
"MERGE (friend:Person {name: $friend_name}) "
"MERGE (a)-[:KNOWS]->(friend)",
name=name, friend_name=friend_name, database_="neo4j",
)
def print_friends(driver, name):
records, _, _ = driver.execute_query(
"MATCH (a:Person)-[:KNOWS]->(friend) WHERE a.name = $name "
"RETURN friend.name ORDER BY friend.name",
name=name, database_="neo4j", routing_=RoutingControl.READ,
)
for record in records:
print(record["friend.name"])
with GraphDatabase.driver(URI, auth=AUTH) as driver:
add_friend(driver, "Arthur", "Guinevere")
add_friend(driver, "Arthur", "Lancelot")
add_friend(driver, "Arthur", "Merlin")
print_friends(driver, "Arthur")
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