Search icon Close icon
Search icon CANCEL
Subscription
0
Cart icon
Your Cart (0 item)
Close icon
You have no products in your basket yet
Checkout

Change country

Modal Close icon
Country selected Country selected
country flag United States
Country selected
country flag Great Britain
Country selected
country flag India
Country selected
country flag Germany
Country selected
country flag France
Country selected
country flag Canada
Country selected
country flag Russia
Country selected
country flag Spain
Country selected
country flag Brazil
Country selected
country flag Australia
Country selected
country flag Singapore
Country selected
country flag Hungary
Country selected
country flag Ukraine
Country selected
country flag Luxembourg
Country selected
country flag Estonia
Country selected
country flag Lithuania
Country selected
country flag South Korea
Country selected
country flag Turkey
Country selected
country flag Switzerland
Country selected
country flag Colombia
Country selected
country flag Taiwan
Country selected
country flag Chile
Country selected
country flag Norway
Country selected
country flag Ecuador
Country selected
country flag Indonesia
Country selected
country flag New Zealand
Country selected
country flag Cyprus
Country selected
country flag Denmark
Country selected
country flag Finland
Country selected
country flag Poland
Country selected
country flag Malta
Country selected
country flag Czechia
Country selected
country flag Austria
Country selected
country flag Sweden
Country selected
country flag Italy
Country selected
country flag Egypt
Country selected
country flag Belgium
Country selected
country flag Portugal
Country selected
country flag Slovenia
Country selected
country flag Ireland
Country selected
country flag Romania
Country selected
country flag Greece
Country selected
country flag Argentina
Country selected
country flag Netherlands
Country selected
country flag Bulgaria
Country selected
country flag Latvia
Country selected
country flag South Africa
Country selected
country flag Malaysia
Country selected
country flag Japan
Country selected
country flag Slovakia
Country selected
country flag Philippines
Country selected
country flag Mexico
Country selected
country flag Thailand
Country selected
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Newsletter Hub
Free Learning
Arrow right icon
timer SALE ENDS IN
0 Days
:
00 Hours
:
00 Minutes
:
00 Seconds
Home > Web Development > Server Side Web Development > Flask Framework Cookbook
Flask Framework Cookbook
Flask Framework Cookbook

Flask Framework Cookbook: Over 80 hands-on recipes to help you create small-to-large web applications using Flask

Arrow left icon
Profile Icon Shalabh Aggarwal
Arrow right icon
AU$24.99 per month
Full star icon Full star icon Full star icon Full star icon Half star icon 4.3 (4 Ratings)
Paperback Nov 2014 258 pages 1st Edition
eBook
AU$36.99 AU$52.99
Paperback
AU$66.99
Subscription
Free Trial
Renews at AU$24.99p/m
Arrow left icon
Profile Icon Shalabh Aggarwal
Arrow right icon
AU$24.99 per month
Full star icon Full star icon Full star icon Full star icon Half star icon 4.3 (4 Ratings)
Paperback Nov 2014 258 pages 1st Edition
eBook
AU$36.99 AU$52.99
Paperback
AU$66.99
Subscription
Free Trial
Renews at AU$24.99p/m
eBook
AU$36.99 AU$52.99
Paperback
AU$66.99
Subscription
Free Trial
Renews at AU$24.99p/m

What do you get with a Packt Subscription?

Free for first 7 days. $24.99 p/m after that. Cancel any time!
Product feature icon Unlimited ad-free access to the largest independent learning library in tech. Access this title and thousands more!
Product feature icon 50+ new titles added per month, including many first-to-market concepts and exclusive early access to books as they are being written.
Product feature icon Innovative learning tools, including AI book assistants, code context explainers, and text-to-speech.
Product feature icon Thousands of reference materials covering every tech concept you need to stay up to date.
Subscribe now
View plans & pricing
Table of content icon View table of contents Preview book icon Preview Book

Flask Framework Cookbook

Chapter 2. Templating with Jinja2

This chapter will cover the basics of Jinja2 templating from the perspective of Flask; we will also learn how to make applications with modular and extensible templates.

In this chapter, we will cover the following recipes:

  • Bootstrap layout
  • Block composition and layout inheritance
  • Creating a custom context processor
  • Creating a custom Jinja2 filter
  • Creating a custom macro for forms
  • Advanced date and time formatting

Introduction

In Flask, we can write a complete web application without the need of any third-party templating engine. For example, have a look at the following code; this is a simple Hello World application with a bit of HTML styling included:

from flask import Flask
app = Flask(__name__)

@app.route('/')
@app.route('/hello')
@app.route('/hello/<user>')
def hello_world(user=None):
    user = user or 'Shalabh'
    return '''
<html>
    <head>
      <title>Flask Framework Cookbook</title>

    </head>
      <body>
        <h1>Hello %s!</h1>
        <p>Welcome to the world of Flask!</p>
      </body>
</html>''' % user

if __name__ == '__main__':
    app.run()

Is the preceding pattern of writing the application feasible in the case of large applications that involve thousands of lines of HTML, JS, and CSS code? Obviously not!

Here, templating...

Bootstrap layout

Most of the applications in Flask follow a specific pattern to lay out templates. In this recipe, we will talk about the recommended way of structuring the layout of templates in a Flask application.

Getting ready

By default, Flask expects the templates to be placed inside a folder named templates at the application root level. If this folder is present, then Flask will automatically read the contents by making the contents of this folder available for use with the render_template() method, which we will use extensively throughout this book.

How to do it…

Let's demonstrate this with a small application. This application is very similar to the one we developed in Chapter 1, Flask Configurations. The first thing to do is add a new folder named templates under my_app. The application structure will now look like the following lines of code:

flask_app/
    - run.py
    my_app/
        – __init__.py
        - hello/
            - __init__.py
            - views...

Block composition and layout inheritance

Usually, any web application will have a number of web pages that will be different from each other. Code blocks such as headers and footers will be the same in almost all the pages throughout the site. Likewise, the menu also remains the same. In fact, usually, just the center container block changes, and the rest usually remains the same. For this, Jinja2 provides a great way of inheritance among templates.

It's a good practice to have a base template where we can structure the basic layout of the site along with the header and footer.

Getting ready

In this recipe, we will try to create a small application where we will have a home page and a product page (such as the ones we see on e-commerce stores). We will use the Bootstrap framework to give a minimalistic design to our templates. Bootstrap can be downloaded from http://getbootstrap.com/.

Here, we have a hardcoded data store for a few products placed in the models.py file. These are read in...

Creating a custom context processor

Sometimes, we might want to calculate or process a value directly in the templates. Jinja2 maintains a notion that the processing of logic should be handled in views and not in templates, and thus, it keeps the templates clean. A context processor becomes a handy tool in this case. We can pass our values to a method; this will then be processed in a Python method, and our resultant value will be returned. Therefore, we are essentially just adding a function to the template context (thanks to Python for allowing us to pass around functions just like any other object).

How to do it…

Let's say we want to show the descriptive name of the product in the format Category / Product-name:

@product_blueprint.context_processor:
def some_processor():
    def full_name(product):
        return '{0} / {1}'.format(product['category'], product['name'])
    return {'full_name': full_name}

A context is simply a dictionary...

Creating a custom Jinja2 filter

After looking at the previous recipe, experienced developers might think that it was stupid to use a context processor to create a descriptive product name. We can simply write a filter to get the same result; this will make things much cleaner. A filter can be written to display the descriptive name of the product as shown here:

@product_blueprint.template_filter('full_name')
def full_name_filter(product):
    return '{0} / {1}'.format(product['category'], product['name'])

This can be used as follows:

{{ product|full_name }}

The preceding code will yield a similar result as it did in the previous recipe.

How to do it…

To take things to a higher level, let's create a filter to format the currency based on the current local language:

import ccy
from flask import request

@app.template_filter('format_currency')
def format_currency_filter(amount):
    currency_code = ccy.countryccy(request.accept_languages...

Introduction

In Flask, we can write a complete web application without the need of any third-party templating engine. For example, have a look at the following code; this is a simple Hello World application with a bit of HTML styling included:

from flask import Flask
app = Flask(__name__)

@app.route('/')
@app.route('/hello')
@app.route('/hello/<user>')
def hello_world(user=None):
    user = user or 'Shalabh'
    return '''
<html>
    <head>
      <title>Flask Framework Cookbook</title>

    </head>
      <body>
        <h1>Hello %s!</h1>
        <p>Welcome to the world of Flask!</p>
      </body>
</html>''' % user

if __name__ == '__main__':
    app.run()

Is the preceding pattern of writing the application feasible in the case of large applications that involve thousands of lines of HTML, JS, and CSS code? Obviously not!

Here, templating saves us because we can structure our view code by keeping our templates separate...

Bootstrap layout

Most of the applications in Flask follow a specific pattern to lay out templates. In this recipe, we will talk about the recommended way of structuring the layout of templates in a Flask application.

Getting ready

By default, Flask expects the templates to be placed inside a folder named templates at the application root level. If this folder is present, then Flask will automatically read the contents by making the contents of this folder available for use with the render_template() method, which we will use extensively throughout this book.

How to do it…

Let's demonstrate this with a small application. This application is very similar to the one we developed in Chapter 1, Flask Configurations. The first thing to do is add a new folder named templates under my_app. The application structure will now look like the following lines of code:

flask_app/
    - run.py
    my_app/
        – __init__.py
        - hello/
            - __init__.py
            - views.py
        - templates...
Left arrow icon

Page 1 of 8

Right arrow icon

Description

If you are a web developer who wants to learn more about developing applications in Flask and scale them with industry-standard practices, this is the book for you. This book will also act as a handy tool if you are aware of Flask's major extensions and want to make the best use of them. It is assumed that you have knowledge of Python and a basic understanding of Flask. If you are completely new to Flask, reading the book from the first chapter and going forward will help in getting acquainted with Flask as you go ahead.

What you will learn

  • Configure Flask in the best way to suit your application needs
  • Integrate Flask with technologies such as Redis, Sentry, and MongoDB
  • Integrate your applications with most of the login mechanisms available
  • Write beautiful RESTful applications
  • Create an admin interface for your application
  • Learn about efficient and effective debugging, logging, and error handling in Flask
  • Test your applications as you write them to prevent future complications
  • Implement fulltext search for effective user query handling

Product Details

Country selected
Publication date, Length, Edition, Language, ISBN-13
Publication date : Nov 21, 2014
Length: 258 pages
Edition : 1st
Language : English
ISBN-13 : 9781783983407
Category :
Web Development
Languages :
Python
Concepts :
Server Side Web Development
Tools :
Flask

What do you get with a Packt Subscription?

Free for first 7 days. $24.99 p/m after that. Cancel any time!
Product feature icon Unlimited ad-free access to the largest independent learning library in tech. Access this title and thousands more!
Product feature icon 50+ new titles added per month, including many first-to-market concepts and exclusive early access to books as they are being written.
Product feature icon Innovative learning tools, including AI book assistants, code context explainers, and text-to-speech.
Product feature icon Thousands of reference materials covering every tech concept you need to stay up to date.
Subscribe now
View plans & pricing

Product Details

Publication date : Nov 21, 2014
Length: 258 pages
Edition : 1st
Language : English
ISBN-13 : 9781783983407
Category :
Web Development
Languages :
Python
Concepts :
Server Side Web Development
Tools :
Flask

Packt Subscriptions

See our plans and pricing
Modal Close icon
AU$24.99 billed monthly
Feature tick icon Unlimited access to Packt's library of 7,000+ practical books and videos
Feature tick icon Constantly refreshed with 50+ new titles a month
Feature tick icon Exclusive Early access to books as they're written
Feature tick icon Solve problems while you work with advanced search and reference features
Feature tick icon Offline reading on the mobile app
Feature tick icon Simple pricing, no contract
START FREE TRIAL
BUY NOW
AU$249.99 billed annually
Feature tick icon Unlimited access to Packt's library of 7,000+ practical books and videos
Feature tick icon Constantly refreshed with 50+ new titles a month
Feature tick icon Exclusive Early access to books as they're written
Feature tick icon Solve problems while you work with advanced search and reference features
Feature tick icon Offline reading on the mobile app
Feature tick icon Choose a DRM-free eBook or Video every month to keep
Feature tick icon PLUS own as many other DRM-free eBooks or Videos as you like for just AU$5 each
Feature tick icon Exclusive print discounts
START FREE TRIAL
BUY NOW
AU$349.99 billed in 18 months
Feature tick icon Unlimited access to Packt's library of 7,000+ practical books and videos
Feature tick icon Constantly refreshed with 50+ new titles a month
Feature tick icon Exclusive Early access to books as they're written
Feature tick icon Solve problems while you work with advanced search and reference features
Feature tick icon Offline reading on the mobile app
Feature tick icon Choose a DRM-free eBook or Video every month to keep
Feature tick icon PLUS own as many other DRM-free eBooks or Videos as you like for just AU$5 each
Feature tick icon Exclusive print discounts
START FREE TRIAL
BUY NOW

Frequently bought together

Flask Framework Cookbook
Flask Framework Cookbook
Read more
Nov 2014 258 pages
Full star icon 4.3 (4)
eBook
eBook
  • eBook eBook AU$36.99
  • Paperback Paperback AU$66.99
AU$36.99 AU$52.99
AU$66.99
Stars icon
Total AU$ 66.99
Flask Framework Cookbook
AU$66.99
Total AU$ 66.99 Stars icon

Table of Contents

13 Chapters
1. Flask Configurations Chevron down icon Chevron up icon
1. Flask Configurations
Introduction
Environment setup with virtualenv
Handling basic configurations
Class-based settings
Organization of static files
Being deployment specific with instance folders
Composition of views and models
Creating a modular web app with blueprints
Making a Flask app installable using setuptools
2. Templating with Jinja2 Chevron down icon Chevron up icon
2. Templating with Jinja2
Introduction
Bootstrap layout
Block composition and layout inheritance
Creating a custom context processor
Creating a custom Jinja2 filter
Creating a custom macro for forms
Advanced date and time formatting
3. Data Modeling in Flask Chevron down icon Chevron up icon
3. Data Modeling in Flask
Introduction
Creating a SQLAlchemy DB instance
Creating a basic product model
Creating a relational category model
Database migration using Alembic and Flask-Migrate
Model data indexing with Redis
Opting the NoSQL way with MongoDB
4. Working with Views Chevron down icon Chevron up icon
4. Working with Views
Introduction
Writing function-based views and URL routes
Class-based views
URL routing and product-based pagination
Rendering to templates
Dealing with XHR requests
Decorator to handle requests beautifully
Creating custom 404 and 500 handlers
Flashing messages for better user feedback
SQL-based searching
5. Webforms with WTForms Chevron down icon Chevron up icon
5. Webforms with WTForms
Introduction
SQLAlchemy model data as form representation
Validating fields on the server side
Creating a common forms set
Creating custom fields and validation
Creating a custom widget
Uploading files via forms
Cross-site Request Forgery protection
6. Authenticating in Flask Chevron down icon Chevron up icon
6. Authenticating in Flask
Introduction
Simple session-based authentication
Authenticating using the Flask-Login extension
Using OpenID for authentication
Using Facebook for authentication
Using Google for authentication
Using Twitter for authentication
7. RESTful API Building Chevron down icon Chevron up icon
7. RESTful API Building
Introduction
Creating a class-based REST interface
Creating an extension-based REST interface
Creating a SQLAlchemy-independent REST API
A complete REST API example
8. Admin Interface for Flask Apps Chevron down icon Chevron up icon
8. Admin Interface for Flask Apps
Introduction
Creating a simple CRUD interface
Using the Flask-Admin extension
Registering models with Flask-Admin
Creating custom forms and actions
WYSIWYG for textarea integration
Creating user roles
9. Internationalization and Localization Chevron down icon Chevron up icon
9. Internationalization and Localization
Introduction
Adding a new language
Lazy evaluation and the gettext/ngettext functions
Global language-switching action
10. Debugging, Error Handling, and Testing Chevron down icon Chevron up icon
10. Debugging, Error Handling, and Testing
Introduction
Setting up basic file logging
Sending e-mails on the occurrence of errors
Using Sentry to monitor exceptions
Debugging with pdb
Creating our first simple test
Writing more tests for views and logic
Nose library integration
Using mocking to avoid real API access
Determining test coverage
Using profiling to find bottlenecks
11. Deployment and Post Deployment Chevron down icon Chevron up icon
11. Deployment and Post Deployment
Introduction
Deploying with Apache
Deploying with uWSGI and Nginx
Deploying with Gunicorn and Supervisor
Deploying with Tornado
Using Fabric for deployment
S3 storage for file uploads
Deploying with Heroku
Deploying with AWS Elastic Beanstalk
Application monitoring with Pingdom
Application performance management and monitoring with New Relic
12. Other Tips and Tricks Chevron down icon Chevron up icon
12. Other Tips and Tricks
Introduction
Full-text search with Whoosh
Full-text search with Elasticsearch
Working with signals
Using caching with your application
E-mail support for Flask applications
Understanding asynchronous operations
Working with Celery
Index Chevron down icon Chevron up icon
Index

Recommendations for you

Left arrow icon
Full-Stack Flask and React
Full-Stack Flask and React
Read more
Oct 2023 408 pages
Full star icon 4.3 (4)
eBook
eBook
  • eBook eBook AU$30.99
  • Paperback Paperback AU$55.99
AU$30.99 AU$44.99
AU$55.99
C# 13 and .NET 9 – Modern Cross-Platform Development Fundamentals
C# 13 and .NET 9 – Modern Cross-Platform Development Fundamentals
Read more
Nov 2024 828 pages
Full star icon 4.4 (5)
eBook
eBook
  • eBook eBook AU$38.99
  • Paperback Paperback AU$68.99
AU$38.99 AU$55.99
AU$68.99
Real-World Web Development with .NET 9
Real-World Web Development with .NET 9
Read more
Dec 2024 578 pages
Full star icon 4.3 (3)
eBook
eBook
  • eBook eBook AU$38.99
  • Paperback Paperback AU$68.99
AU$38.99 AU$55.99
AU$68.99
Django 5 By Example
Django 5 By Example
Read more
Apr 2024 820 pages
Full star icon 4.6 (38)
eBook
eBook
  • eBook eBook AU$38.99
  • Paperback Paperback AU$68.99
AU$38.99 AU$55.99
AU$68.99
React and React Native
React and React Native
Read more
Apr 2024 508 pages
Full star icon 4.3 (10)
eBook
eBook
  • eBook eBook AU$33.99
  • Paperback Paperback AU$60.99
AU$33.99 AU$48.99
AU$60.99
Scalable Application Development with NestJS
Scalable Application Development with NestJS
Read more
Jan 2025 612 pages
Full star icon 4.8 (5)
eBook
eBook
  • eBook eBook AU$30.99
  • Paperback Paperback AU$55.99
AU$30.99 AU$44.99
AU$55.99
C# 12 and .NET 8 – Modern Cross-Platform Development Fundamentals
C# 12 and .NET 8 – Modern Cross-Platform Development Fundamentals
Read more
Nov 2023 828 pages
Full star icon 4.4 (74)
eBook
eBook
  • eBook eBook AU$45.99
  • Paperback Paperback AU$82.99
AU$45.99 AU$66.99
AU$82.99
Responsive Web Design with HTML5 and CSS
Responsive Web Design with HTML5 and CSS
Read more
Sep 2022 498 pages
Full star icon 4.5 (57)
eBook
eBook
  • eBook eBook AU$34.98
  • Paperback Paperback AU$61.99
AU$34.98 AU$49.99
AU$61.99
Modern Full-Stack React Projects
Modern Full-Stack React Projects
Read more
Jun 2024 506 pages
Full star icon 5 (8)
eBook
eBook
  • eBook eBook AU$34.98
  • Paperback Paperback AU$61.99
AU$34.98 AU$49.99
AU$61.99
Learning Angular
Learning Angular
Read more
Jan 2025 486 pages
Full star icon 4 (6)
eBook
eBook
  • eBook eBook AU$31.99
  • Paperback Paperback AU$57.99
AU$31.99 AU$46.99
AU$57.99
Right arrow icon

Customer reviews

Rating distribution
Full star icon Full star icon Full star icon Full star icon Half star icon 4.3
(4 Ratings)
5 star 50%
4 star 25%
3 star 25%
2 star 0%
1 star 0%
Martin Jan 07, 2015
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Kurze beispiele die Praxis relevant sind und viel wiederkehrende aufgaben kurz und gut erklären.Preis leistung stimmen. Der inhalt ist nicht so einfach zusammen zu googlen so das ich das Buch jederzeit wieder Kaufen würde.
Amazon Verified review Amazon
Neil Goldman Nov 30, 2014
Full star icon Full star icon Full star icon Full star icon Full star icon 5
I also own the Flask Web Development book, and was worried there would be a lot of overlap in content, because that's also written with a cookbook-ish style. But I'm very happy with this purchase, it goes very in depth and provides several alternative ways to build parts your application. It also covers more advanced "real-world" topics, like caching, logging/monitoring in production, and deploying to a variety of different servers and platforms.Like any other cookbook, most of the content can be found by searching Google or SO, but it's worth it to me to have a book of well-written examples to things I encounter frequently.The Kindle edition is well formatted and readable on my paperwhite and the desktop app just fine.
Amazon Verified review Amazon
William P Ross Jul 27, 2016
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
This is a well written recipe book for intermediate and advanced users of Flask. It assumes you already know Python and have used Flask before. I found the topics to be wide ranging, and each recipe is usually 1-5 pages long.The primary example app used throughout the book is a catalog of digital products. In the beginning are recipes were dedicated to setting up the page and displaying the products, such as showing an iPhone and its price. Later items focused on things like using a database, caching, and searching. This example worked well because many modern websites are displaying different items, and a lot of the examples could be easily adapated to another application.Writing in the book is intelligent, and the order is well structed. One thing was the author deferred to often to online documentation at the end of recipes rather than just making the recipe longer. I think certain sections needed more of a meta-view or summary than just purely having the recipes. For example, chapter 11 is about deployment. It is less than 30 pages long but covers: Apache, uSWGI, Nginx, Gunicorn, Supervisor, Tornado, Fabricc, S3, Heroku, AWS Elastic Beanstalk, Pingdom, and New Relic. This was just too many topics to try and introduce all at once, and there was no indication as to which would be the best deployment service for most users; or what to use in specific cases.Overall this book has a lot of value for Flask users and I would read this author again.
Amazon Verified review Amazon
Jerry W. Feb 21, 2015
Full star icon Full star icon Full star icon Empty star icon Empty star icon 3
Although the book was coherently written, the kindle version was not adequately formatted for copying and pasting source code straight from the book. Because of this, I cannot give more than three stars.
Amazon Verified review Amazon

People who bought this also bought

Left arrow icon
C# 11 and .NET 7 – Modern Cross-Platform Development Fundamentals
C# 11 and .NET 7 – Modern Cross-Platform Development Fundamentals
Read more
Nov 2022 818 pages
Full star icon 4.1 (54)
eBook
eBook
  • eBook eBook AU$38.99
  • Paperback Paperback AU$68.99
AU$38.99 AU$55.99
AU$68.99
C# 12 and .NET 8 – Modern Cross-Platform Development Fundamentals
C# 12 and .NET 8 – Modern Cross-Platform Development Fundamentals
Read more
Nov 2023 828 pages
Full star icon 4.4 (74)
eBook
eBook
  • eBook eBook AU$45.99
  • Paperback Paperback AU$82.99
AU$45.99 AU$66.99
AU$82.99
Responsive Web Design with HTML5 and CSS
Responsive Web Design with HTML5 and CSS
Read more
Sep 2022 498 pages
Full star icon 4.5 (57)
eBook
eBook
  • eBook eBook AU$34.98
  • Paperback Paperback AU$61.99
AU$34.98 AU$49.99
AU$61.99
React and React Native
React and React Native
Read more
May 2022 606 pages
Full star icon 4.6 (17)
eBook
eBook
  • eBook eBook AU$38.99
  • Paperback Paperback AU$68.99
AU$38.99 AU$55.99
AU$68.99
Building Python Microservices with FastAPI
Building Python Microservices with FastAPI
Read more
Aug 2022 420 pages
Full star icon 3.9 (9)
eBook
eBook
  • eBook eBook AU$35.99
  • Paperback Paperback AU$64.99
AU$35.99 AU$51.99
AU$64.99
Right arrow icon

About the author

Profile icon Shalabh Aggarwal
Shalabh Aggarwal
Shalabh Aggarwal is a seasoned engineering leader who develops and manages enterprise systems and web and mobile applications for small- and large-scale organizations. He started his career working with Python, and although he now works on multiple technologies, he remains a Python developer at heart. He is passionate about open source technologies and writes highly readable and high-quality code. Throughout his career, he has built software products and engineering teams for companies moving from 0 to 1, 1 to 10, and 10 to 100 levels. He is also active in voluntary training for engineering students and young engineers on non-conventional and open source topics. When not working with full-time assignments, he consults for start-ups on starting or scaling up while leveraging different technologies. When not writing code, he dedicates his time to his young kid and occasional travels.
Read more
See other products by Shalabh Aggarwal
Get free access to Packt library with over 7500+ books and video courses for 7 days!
Start Free Trial

FAQs

What is included in a Packt subscription? Chevron down icon Chevron up icon

A subscription provides you with full access to view all Packt and licnesed content online, this includes exclusive access to Early Access titles. Depending on the tier chosen you can also earn credits and discounts to use for owning content

How can I cancel my subscription? Chevron down icon Chevron up icon

To cancel your subscription with us simply go to the account page - found in the top right of the page or at https://subscription.packtpub.com/my-account/subscription - From here you will see the ‘cancel subscription’ button in the grey box with your subscription information in.

What are credits? Chevron down icon Chevron up icon

Credits can be earned from reading 40 section of any title within the payment cycle - a month starting from the day of subscription payment. You also earn a Credit every month if you subscribe to our annual or 18 month plans. Credits can be used to buy books DRM free, the same way that you would pay for a book. Your credits can be found in the subscription homepage - subscription.packtpub.com - clicking on ‘the my’ library dropdown and selecting ‘credits’.

What happens if an Early Access Course is cancelled? Chevron down icon Chevron up icon

Projects are rarely cancelled, but sometimes it's unavoidable. If an Early Access course is cancelled or excessively delayed, you can exchange your purchase for another course. For further details, please contact us here.

Where can I send feedback about an Early Access title? Chevron down icon Chevron up icon

If you have any feedback about the product you're reading, or Early Access in general, then please fill out a contact form here and we'll make sure the feedback gets to the right team. 

Can I download the code files for Early Access titles? Chevron down icon Chevron up icon

We try to ensure that all books in Early Access have code available to use, download, and fork on GitHub. This helps us be more agile in the development of the book, and helps keep the often changing code base of new versions and new technologies as up to date as possible. Unfortunately, however, there will be rare cases when it is not possible for us to have downloadable code samples available until publication.

When we publish the book, the code files will also be available to download from the Packt website.

How accurate is the publication date? Chevron down icon Chevron up icon

The publication date is as accurate as we can be at any point in the project. Unfortunately, delays can happen. Often those delays are out of our control, such as changes to the technology code base or delays in the tech release. We do our best to give you an accurate estimate of the publication date at any given time, and as more chapters are delivered, the more accurate the delivery date will become.

How will I know when new chapters are ready? Chevron down icon Chevron up icon

We'll let you know every time there has been an update to a course that you've bought in Early Access. You'll get an email to let you know there has been a new chapter, or a change to a previous chapter. The new chapters are automatically added to your account, so you can also check back there any time you're ready and download or read them online.

I am a Packt subscriber, do I get Early Access? Chevron down icon Chevron up icon

Yes, all Early Access content is fully available through your subscription. You will need to have a paid for or active trial subscription in order to access all titles.

How is Early Access delivered? Chevron down icon Chevron up icon

Early Access is currently only available as a PDF or through our online reader. As we make changes or add new chapters, the files in your Packt account will be updated so you can download them again or view them online immediately.

How do I buy Early Access content? Chevron down icon Chevron up icon

Early Access is a way of us getting our content to you quicker, but the method of buying the Early Access course is still the same. Just find the course you want to buy, go through the check-out steps, and you’ll get a confirmation email from us with information and a link to the relevant Early Access courses.

What is Early Access? Chevron down icon Chevron up icon

Keeping up to date with the latest technology is difficult; new versions, new frameworks, new techniques. This feature gives you a head-start to our content, as it's being created. With Early Access you'll receive each chapter as it's written, and get regular updates throughout the product's development, as well as the final course as soon as it's ready.We created Early Access as a means of giving you the information you need, as soon as it's available. As we go through the process of developing a course, 99% of it can be ready but we can't publish until that last 1% falls in to place. Early Access helps to unlock the potential of our content early, to help you start your learning when you need it most. You not only get access to every chapter as it's delivered, edited, and updated, but you'll also get the finalized, DRM-free product to download in any format you want when it's published. As a member of Packt, you'll also be eligible for our exclusive offers, including a free course every day, and discounts on new and popular titles.