Building Web Applications with Python and Neo4j

Sumit Gupta

• Verlag: Packt Publishing
• Jahr: 2015
• ISBN:
  9781783983988
• Auflage: 1
• Thema: Computer Science
• Thema: Programming in Python

If you are a Python developer and want to expand your understanding of Python-based web applications over Neo4j graph data models, this is the book for you.

Building Web Applications with Python and Neo4j

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Table of Contents

Building Web Applications with Python and Neo4j

Credits

About the Author

About the Reviewers

www.PacktPub.com

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Why subscribe?

Free access for Packt account holders

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Downloading the example code

Errata

Piracy

Questions

1. Your First Query with Neo4j

Thinking in graphs for SQL developers

Comparing SQL and Cypher

Evolving graph structures from SQL models

Licensing and configuring – Neo4j

Licensing – Community Edition

Licensing – Enterprise Edition

Installing Neo4J Community Edition on Linux/Unix

Installing as a Linux tar / standalone application

Installing as a Linux service

Installing Neo4j Enterprise Edition on Unix/Linux

Using the Neo4j shell

Introducing the Neo4j REST interface

Authorization and authentication

CRUD operations

Running queries from the Neo4j browser

Summary

2. Querying the Graph with Cypher

Basic anatomy of a Cypher query

Brief details of Cypher

Cypher execution phases

Parsing, validating, and generating the execution plan

Locating the initial node(s)

Selecting and traversing the relationships

Changing and/or returning the values

The structure of Cypher

The read operations

MATCH

OPTIONAL MATCH

START

AGGREGATION

The create or update operations

Create

SET

MERGE

The delete operation

Pattern and pattern matching

Sample dataset

Pattern for nodes

Pattern for labels

Pattern for relationships

Pattern for properties

Using the where clause with patterns

Using patterns in the where clause

Using general clauses with patterns

The order by clause

The limit and skip clauses

The WITH clause

The UNION and UNION ALL clauses

Working with nodes and relationships

Summary

3. Mutating Graph with Cypher

Creating nodes and relationships

Working with nodes

Single node

Multiple nodes

Node with labels

Node with properties

Working with relationships

Single relationships

Multiple relationships

Relationships with properties

Nodes and relationships with full paths

Creating unique nodes and relationships

CREATE UNIQUE and MERGE

Working with constraints

Transforming nodes and relationships

Updating node properties

Updating a label

Updating relationships

Cypher query optimizations

Indexes

Index sampling

Understanding execution plans

Analyzing and optimizing queries

Summary

4. Getting Python and Neo4j to Talk Py2neo

Installing and configuring py2neo

Prerequisites

Installing py2neo

Exploring the py2neo APIs

Graph

Authentication

Node

Relationship

Cypher

Transactions

Paths

Creating a social network with py2neo

Batch imports

Unit testing

Summary

5. Build RESTful Service with Flask and Py2neo

Introducing (and installing) Flask

Setting up web applications with Flask and Flask-RESTful

Your first Flask application

Displaying static content

Displaying dynamic content

Your first Flask RESTful API

JSON processing

REST APIs for social network data using py2neo

ORM for graph databases py2neo – OGM

Social network application with Flask-RESTful and OGM

Creating object model

Creating REST APIs over data models

Summary

6. Using Neo4j with Django and Neomodel

Installing and configuring Neomodel

Declaring models and properties

Defining nodes

Defining properties

Persisting and querying a social data model

Adding relationships to models

Running Cypher queries

Using Neomodel in a Django app

Signals in Neomodel

Summary

7. Deploying Neo4j in Production

Neo4j logical architecture

Disk/filesystem

Record files

Transaction logs

Caches

Core Java API

Traversal framework

REST API

Neo4j physical architecture

High availability

Fault tolerance

Data replication and data locality

Advanced settings

Monitoring the health of the Neo4J nodes

Neo4j browser

Webadmin

JMX beans

Backup and recovery

Summary

Index

Building Web Applications with Python and Neo4j

Copyright © 2015 Packt Publishing

All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews.

Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author, nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book.

Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information.

First published: July 2015

Production reference: 1100715

Published by Packt Publishing Ltd.

Livery Place

35 Livery Street

Birmingham B3 2PB, UK.

ISBN 978-1-78398-398-8

www.packtpub.com

Credits

Author

Sumit Gupta

Reviewers

Adarsh Deshratnam

Gianluca Tiepolo

Tsanyo Tsanev

Manuel Vives

Commissioning Editor

Kunal Parikh

Acquisition Editor

Larissa Pinto

Content Development Editor

Anish Sukumaran

Technical Editors

Novina Kewalramani

Ryan Kochery

Manal Pednekar

Copy Editors

Vikrant Phadke

Alpha Singh

Project Coordinator

Izzat Contractor

Proofreader

Safis Editing

Indexer

Rekha Nair

Production Coordinator

Aparna Bhagat

Cover Work

Aparna Bhagat

About the Author

Sumit Gupta is a seasoned professional, innovator, and technology evangelist, with over 100 months of experience in architecting, managing, and delivering en...