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The JavaScript JSON Cookbook

The JavaScript JSON Cookbook

By : Ray Rischpater
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The JavaScript JSON Cookbook

The JavaScript JSON Cookbook

1 (2)
By: Ray Rischpater

Overview of this book

If you're writing applications that move structured data from one place to another, this book is for you. This is especially true if you've been using XML to do the job because it's entirely possible that you could do much of the same work with less code and less data overhead in JSON. While the book's chapters make some distinction between the client and server sides of an application, it doesn't matter if you're a frontend, backend, or full-stack developer. The principles behind using JSON apply to both the client and the server, and in fact, developers who understand both sides of the equation generally craft the best applications.
Table of Contents (17 chapters)
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JavaScript JSON Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Using JSONPath in your Python application


There are several implementations of JSONPath for Python, too. The best is jsonpath-rw library, which provides language extensions so that paths are first-class language objects.

Getting ready

You'll need to install the jsonpath-rw library using pip:

pip install jsonpath-rw

Also, of course, you will need to include the necessary bits of the library when using them:

fromjsonpath_rw import jsonpath, parse

How to do it…

Here's a simple example using our store contents in the introduction stored in the variable object:

>>> object = { … }

>>>path = parse('$..title') 

>>> [match.value for match in path.find(object)]
['Sayings of the Century','Sword of Honour', 'Moby Dick', 'The Lord of the Rings']

How it works…

Processing a path expression using this library is a little like matching a regular expression; you parse out the JSONPath expression and then apply it to the Python object you want to slice using path's find method. This...

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