neo4j 5.6.0

Neo4j Bolt driver for Python

This repository contains the official Neo4j driver for Python.

Starting with 5.0, the Neo4j Drivers will be moving to a monthly release cadence. A minor version will be released on the last Friday of each month so as to maintain versioning consistency with the core product (Neo4j DBMS) which has also moved to a monthly cadence.

As a policy, patch versions will not be released except on rare occasions. Bug fixes and updates will go into the latest minor version and users should upgrade to that. Driver upgrades within a major version will never contain breaking API changes.

See also: https://neo4j.com/developer/kb/neo4j-supported-versions/

• Python 3.10 supported.

• Python 3.9 supported.

• Python 3.8 supported.

• Python 3.7 supported.

Installation

To install the latest stable version, use:

pip install neo4j

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.

Quick Example

from neo4j import GraphDatabase

driver = GraphDatabase.driver("neo4j://localhost:7687",
                              auth=("neo4j", "password"))

def add_friend(tx, name, friend_name):
    tx.run("MERGE (a:Person {name: $name}) "
           "MERGE (a)-[:KNOWS]->(friend:Person {name: $friend_name})",
           name=name, friend_name=friend_name)

def print_friends(tx, name):
    query = ("MATCH (a:Person)-[:KNOWS]->(friend) WHERE a.name = $name "
             "RETURN friend.name ORDER BY friend.name")
    for record in tx.run(query, name=name):
        print(record["friend.name"])

with driver.session(database="neo4j") as session:
    session.execute_write(add_friend, "Arthur", "Guinevere")
    session.execute_write(add_friend, "Arthur", "Lancelot")
    session.execute_write(add_friend, "Arthur", "Merlin")
    session.execute_read(print_friends, "Arthur")

driver.close()

Connection Settings Breaking Change (4.x)

• The driver’s default configuration for encrypted is now false (meaning that driver will only attempt plain text connections by default).

• Connections to encrypted services (such as Neo4j Aura) should now explicitly be set to encrypted.

• When encryption is explicitly enabled, the default trust mode is to trust the CAs that are trusted by operating system and use hostname verification.

• This means that encrypted connections to servers holding self-signed certificates will now fail on certificate verification by default.

• Using the new neo4j+ssc scheme will allow to connect to servers holding self-signed certificates and not use hostname verification.

• The neo4j:// scheme replaces bolt+routing:// and can be used for both clustered and single-instance configurations with Neo4j 4.0.

See, https://neo4j.com/docs/migration-guide/4.0/upgrade-driver/#upgrade-driver-breakingchanges

See, https://neo4j.com/docs/driver-manual/current/client-applications/#driver-connection-uris for changes in default security settings between 3.x and 4.x

Connecting with Python Driver 4.x to Neo4j 3.5 (EOL)

Using the Python Driver 4.x and connecting to Neo4j 3.5 with default connection settings for Neo4j 3.5.

# the preferred form

driver = GraphDatabase.driver("neo4j+ssc://localhost:7687", auth=("neo4j", "password"))

# is equivalent to

driver = GraphDatabase.driver("neo4j://localhost:7687", auth=("neo4j", "password"), encrypted=True, trust=False)

Connecting with Python Driver 1.7 (EOL) to Neo4j 4.x

Using the Python Driver 1.7 and connecting to Neo4j 4.x with default connection settings for Neo4j 4.x.

driver = GraphDatabase.driver("neo4j://localhost:7687", auth=("neo4j", "password"), encrypted=False)

Other Information

• The Neo4j Operations Manual

• The Neo4j Drivers Manual

• Python Driver API Documentation

• Neo4j Cypher Refcard

• Example Project

• Driver Wiki (includes change logs)

• Neo4j 4.0 Migration Guide