Book Image

Python API Development Fundamentals

By : Jack Chan, Ray Chung, Jack Huang
Book Image

Python API Development Fundamentals

By: Jack Chan, Ray Chung, Jack Huang

Overview of this book

Python is a flexible language that can be used for much more than just script development. By knowing the Python RESTful APIs work, you can build a powerful backend for web applications and mobile applications using Python. You'll take your first steps by building a simple API and learning how the frontend web interface can communicate with the backend. You'll also learn how to serialize and deserialize objects using the marshmallow library. Then, you'll learn how to authenticate and authorize users using Flask-JWT. You'll also learn how to enhance your APIs by adding useful features, such as email, image upload, searching, and pagination. You'll wrap up the whole book by deploying your APIs to the cloud. By the end of this book, you'll have the confidence and skill to leverage the power of RESTful APIs and Python to build efficient web applications.
Table of Contents (12 chapters)

Introduction to Pillow

Pillow, previously known as the Python Imaging Library (PIL), is an image processing package in Python. The most important class in this package is Image. We can use to create an object from an image file. We can then get the image dimension in pixels by using the attribute size. We can also find out the color mode of the image by using the attribute mode.

Some common color modes you should expect to see include L for black and white, RGB for red-green-blue, and CMYK for cyan-magenta-yellow-black:

>>>image ='default-avatar.jpg')
(1600, 1066)

If we want to change the color mode of the picture to RGB, use the convert function. We usually change the color mode to ensure the color accuracy of our images. RGB is the most commonly used color mode for computer monitors:

>>>image = image.convert("RGB")

If we want to resize an image...