Download e-book for iPad: Building Web Applications with Python and Neo4j by Sumit Gupta

By Sumit Gupta

Improve interesting real-world Python-based internet purposes with Neo4j utilizing frameworks comparable to Flask, Py2neo, and Django
About This Book

enhance a suite of universal purposes and suggestions with Neo4j and Python
safe and install the Neo4j database in production
A step by step consultant on imposing and deploying interactive Python-based internet purposes on graph facts model

Who This e-book Is For

If you're a Python developer and need to extend your figuring out of Python-based net functions over Neo4j graph information versions, this can be the booklet for you.
What you are going to Learn

comprehend the licensing and set up of the Neo4j database and paintings with its a variety of instruments and utilities
study 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
strengthen REST-based prone over social community info utilizing Flask and item graph versions over Neo4j
combine Django-based net functions over graph information versions utilizing Neomodel
discover varied deployment versions and their applicability with present applications

In Detail

Py2neo is a straightforward and pragmatic Python library that offers entry to the preferred graph database Neo4j through its RESTful internet carrier interface. This brings with it a seriously refactored middle, a purifier 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 way to combine with a variety of Python frameworks resembling Flask and its extensions: Py2neo, Neomodel, and Django. ultimately, the deployment elements of your Python-based Neo4j functions in a creation atmosphere can also be coated. by means of sequentially operating during the steps in each one bankruptcy, you are going to quick study and grasp some of the implementation information and integrations of Python and Neo4j, assisting you to boost your use circumstances extra quick.

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Def sdo(*args): ... print(args) ... @classmethod ... def cdo(*args): ... print(args) ... def do(*args): ... print(args) ... C object at 0x00DC9E30>, 1, 2) #instancemethod called through class: no implicit argument, acts like static method. do(1,2) (1, 2) They can be understood and implemented using descriptors easily as follows: from functools import partial >>> class my_instancemethod: ... def __init__(self, f): ... # we store reference to function in instance ... # for future reference ... f = f ...

Def foo2(a,): ... print(a) ... >>> foo1(1,2,3,4) 1 (2, 3, 4) >>> foo2(1,2,3,4) Traceback (most recent call last): File "", line 1, in TypeError: foo2() takes 1 positional argument but 4 were given 8. If passed position arguments are less than the defined positional arguments, then the passed keyword arguments are used for values for positional arguments. If no keyword argument is found for the positional argument, we get an error: >>> def foo(a,b,c): ... print(a,b,c) ... >>> foo(1,c=3,b=2) 1 2 3 >>> foo(1,b=2) Traceback (most recent call last): File "", line 1, in TypeError: foo() missing 1 required positional argument: 'c' 9.

Def __iter__(self,): ... return BooksIterState(self) ... >>> ii = iter(Books(["don quixote","lord of the flies","great expectations"])) >>> next(ii) 'don quixote' >>> for i in Books(["don quixote","lord of the flies","great expectations"]): ... print(i) ... don quixote lord of the flies great expectations >>> next(ii) 'lord of the flies' >>> next(ii) [ 33 ] Namespaces and Classes 'great expectations' >>> next(ii) Traceback (most recent call last): File "", line 1, in File "", line 7, in __next__ StopIteration >>> Context manager protocol The objects providing context for execution are like try finally statements.

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