neo4j

Introduction

This set of examples assumes you have the movie database loaded

See https://neo4j.com/graphgists/cypher-introduction-social-movie-database/ for details on the movie database.

Dependencies

All of the dependencies listed below need to be in place before running the code.

• Python virtual environment
• Environment variables

Python Virtual Environment

• Move to the neo4j folder
  • cd <neo4j>
• Create a virtual environment
  • On Mac: python3 -m venv .venv
  • On Windows: python -m venv .venv
• Activate the virtual environment
  • On Mac: source .venv/bin/activate
  • On Windows: .venv\Scripts\activate
• Install dependencies
  • On Mac: pip3 install -r requirements.txt
  • On Windows: pip install -r requirements.txt
• Call a specific script
  • On Mac: python3 <script_name>.py
  • On Windows: python <script_name>.py
• Deactivate virtual environment
  • deactivate

Environment Variables

Create a file named .env with the contents shown below

NEO4J_URI=<address>
NEO4J_USER=<user>
NEO4J_PASSWORD=<password>

Example Output

simple.py

python3 simple.py

Successfully connected to Neo4j
Running a simple query:
Movies that Tom Hanks acted in:
 -  Apollo 13
 -  You've Got Mail
 -  A League of Their Own
 -  Joe Versus the Volcano
 -  That Thing You Do
 -  The Da Vinci Code
 -  Cloud Atlas
 -  Cast Away
 -  The Green Mile
 -  Sleepless in Seattle
 -  The Polar Express
 -  Charlie Wilson's War

The query `MATCH (actor:Person {name: $name})-[:ACTED_IN]->(movies) RETURN actor,movies` returned 12 records in 9 ms.