Book Image

Web Development with Django - Second Edition

By : Ben Shaw, Saurabh Badhwar, Chris Guest, Bharath Chandra K S
4.7 (3)
Book Image

Web Development with Django - Second Edition

4.7 (3)
By: Ben Shaw, Saurabh Badhwar, Chris Guest, Bharath Chandra K S

Overview of this book

Do you want to develop reliable and secure applications that stand out from the crowd without spending hours on boilerplate code? You’ve made the right choice trusting the Django framework, and this book will tell you why. Often referred to as a “batteries included” web development framework, Django comes with all the core features needed to build a standalone application. Web Development with Django will take you through all the essential concepts and help you explore its power to build real-world applications using Python. Throughout the book, you’ll get the grips with the major features of Django by building a website called Bookr – a repository for book reviews. This end-to-end case study is split into a series of bitesize projects presented as exercises and activities, allowing you to challenge yourself in an enjoyable and attainable way. As you advance, you'll acquire various practical skills, including how to serve static files to add CSS, JavaScript, and images to your application, how to implement forms to accept user input, and how to manage sessions to ensure a reliable user experience. You’ll cover everyday tasks that are part of the development cycle of a real-world web application. By the end of this Django book, you'll have the skills and confidence to creatively develop and deploy your own projects.
Table of Contents (19 chapters)

Image uploads with Django forms

If you want to work with images in Python, the most common library that you’ll use is called Pillow, and this is the library Django uses to validate images. Originally there was a library called Python Imaging Library (PIL). It was not kept up to date and, eventually, a fork of the library was created and is still maintained, Pillow. To maintain backward compatibility, the package is still called PIL when installed. For example, the Image object is imported from PIL:

from PIL import Image

The terms Python Imaging Library, PIL, and Pillow are often used interchangeably. You can assume that if someone refers to PIL, they mean the latest Pillow library.

Pillow provides various methods of retrieving data about images or manipulating them. You can find out the width and height of images, scale, crop, and apply transformations to them. There are too many operations available to cover in this chapter, so we will just introduce a simple example...