By Sumit Gupta
Advance intriguing real-world Python-based internet purposes with Neo4j utilizing frameworks corresponding to Flask, Py2neo, and Django
About This Book
enhance a suite of universal functions and recommendations with Neo4j and Python
safe and set up the Neo4j database in production
A step by step advisor on imposing and deploying interactive Python-based internet purposes on graph facts model
Who This booklet Is For
If you're a Python developer and wish to extend your realizing of Python-based net purposes over Neo4j graph information versions, this is often the ebook for you.
What you are going to Learn
comprehend the licensing and install of the Neo4j database and paintings with its quite a few instruments and utilities
research the intricacies of Cypher as a graph question language
paintings with Cypher to create and regulate graph info models
combine Python and Neo4j utilizing Py2neo
boost REST-based prone over social community information utilizing Flask and item graph versions over Neo4j
combine Django-based internet purposes over graph information types utilizing Neomodel
discover varied deployment versions and their applicability with latest applications
Py2neo is an easy and pragmatic Python library that offers entry to the preferred graph database Neo4j through its RESTful net provider interface. This brings with it a seriously refactored middle, a cleanser API, greater functionality, and a few new idioms.
You will start with licensing and fitting Neo4j, studying the basics of Cypher as a graph question language, and exploring Cypher optimizations. you can find the right way to combine with numerous Python frameworks comparable to Flask and its extensions: Py2neo, Neomodel, and Django. ultimately, the deployment features of your Python-based Neo4j functions in a creation setting is usually lined. by means of sequentially operating during the steps in each one bankruptcy, you are going to speedy examine and grasp some of the implementation info and integrations of Python and Neo4j, aiding you to enhance your use situations extra fast.
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Additional info for Building Web Applications with Python and Neo4j
When the server returns the time information in a packed array, the client needs a specialized struct module to unpack the data. The only interesting data is located in the 11th element of the array. Finally, we need to subtract the reference value, TIME1970, from the unpacked value to get the actual current time. 7. 2', 123) Time=Tue Feb 25 14:49:38 2014 How it works... This SNTP client creates a socket connection and sends the protocol data. org), it unpacks the data with struct. Finally, it subtracts the reference time, which is January 1, 1970, and prints the time using the ctime() built-in method in the Python time module.
50 Chapter 2 The following screenshot illustrates the interaction of the Diesel chat server: How it works... Our script has taken a command-line argument for --port and passed this to the main() function where our Diesel application has been initialized and run. Diesel has a notion of service where an application can be built with many services. EchoServer has a handler() method. This enables the server to deal with individual client connections. The Service() method takes the handler method and a port number to run that service.
On a Linux machine, epoll is available. This will utilize the operating system kernel that will poll network events and let our script know whenever something happens. select approach. How to do it... Let's write a simple web server that can return a single line of text to any connected web browser. epoll() and register our server's file descriptor for event notifications. 7 # It may run on any other version with/without modifications. 3 You will also be able to see the following line in your browser: Hello from Epoll Server!
Building Web Applications with Python and Neo4j by Sumit Gupta