Table Of ContentPython
Flask & Django
Full Stack Python for Web
Development
www.emenwa.com
Contents
Contents
Introduction To Full Stack Python Web Development
Full-stack development with Python
Back-end development using Python
Django
Flask
Front-end development using Python
What is Django Used For?
Part 1 Flask
Chapter 1 – Learning the Strings
The PEP Talk
PEP 8: Style Guide for Python Code
PEP 257: Docstring Conventions
Relative imports
Application Directory
Installing Python
Installing Python
Install Pip
Chapter 2 – Virtual Environments
Use virtualenv to manage your environment
Install virtualenvwrapper
Make a Virtual Environment
Installing Python Packages
Chapter 3 – Project Organisation
Patterns of organization
Initialization
Blueprints
Chapter 4 – Routing & Configuration
View decorators
Configuration
Instance folder
How to use instance folders
Secret keys
Configuring based on environment variables
Variable Rule
Chapter 5 – Build A Simple App
The actual app
Development Web Server
Chapter 6 - Dynamic Routes
Converter
Chapter 7 – Static Templates
Rendering HTML Templates
A String
render_template() function
File Structure Strategies
Module File Structure
Package File Structure
Chapter 8 - The Jinja2 Template Engine
Variables
Filters
Control structure
Conditions
loop
Chapter 9 - Bootstrap Integration with Flask
What is Bootstrap?
Getting Started
Code Flask App with Bootstrap
Create a Real Flask Website
Getting Bootsrap
Web App
Page redirect
Template inheritance
What is Template Inheritance
Adding Bootstrap
Nav bar From Bootstrap
Chapter 10 – HTTP Methods (GET/POST) & Retrieving Form Data
GET
POST
Web Forms
Login page template
Back-End
Bootstrap forms
Chapter 11 – Sessions vs. Cookies
Sessions
Sessions or Cookies?
How to set up a Session
Session Data
Session Duration
Chapter 12 – Message Flashing
flash() Function
Displaying Flash Message
Displaying More Than 1 Message
Chapter 13 – SQL Alchemy Set up & Models
Creating A Simple Profile Page
Database Management with Flask-SQL Alchemy
How to use database
Models
Chapter 14 - CRUD
The Flask Book Store
Your static web page with Flask
Handling user input in our web application
Templates
Back-end
Add a database
Front-end
Initializing
Retrieving books from our database
Updating book titles
Deleting books from our database
Chapter 15 – Deployment
Web Hosting
Amazon Web Services EC2
Heroku
Digital Ocean
Requirements for deployment
Gunicorn
Deploy!
Set up Git
Push your Site
Part 2 Django
Chapter 1 - Installing to Get Started
Introducing the Command Line
Shell Commands
Virtual Environments
Installing Django
Setup your Virtual Environment for Django on macOS/Linux
Installing Pipenv Globally
Your First Blank Django Project
Introducing Text Editors
Setting Up Django on VS Code
Lastly, Git
Chapter 2 - Create Your First Django Project
Setup
HTTP Request/Response Cycle
Model-View-Controller (MVC) and Model-View-Template (MVT)
Creating A Blank App
Designing Pages
Using Git
Chapter 3 - Django App With Pages
Setup
Adding Templates
Class and Views
Our URLs
About Page
Extending Templates
Testing
Website Production
Heroku
Let’s Deploy
Chapter 4 - Create Your First Database-Driven App And Use The Django
Admin
Initial Setup
Let’s Create a Database Model
Activate the models
Django Admin
Views/Templates/URLs
Let’s Add New Posts
Tests
Storing to GitHub
Setup Heroku
Deploy to Heroku
Chapter 5 – Blog App
Initial Set Up
Database Models
Admin Access
URLs
Views
Templates
Add some Style!
Individual Blog Pages
Testing
Git
Chapter 6 – Django Web Forms
CreateView
Let Anyone Edit The Blog
Let Users Delete Posts
Testing Program
Chapter 7- User Accounts
User Login Access
Calling the User’s Name on The HomePage
User Log Out Access
Allow Users to Sign Up
Link to Sign Up
GitHub
Static Files
Time for Heroku
Deploy to Heroku
PostgreSQL vs SQLite
Conclusion
Follow-Up Actions
Third-party bundles
I T F S P W
NTRODUCTION O ULL TACK YTHON EB
D
EVELOPMENT
Full stack developers are hard to find these days! You are among a tiny
percentage that will stand out as a professional web developer.
As technology advances, the technological world undergoes rapid change.
The days when a developer can easily keep a job with only one programming
language for years without picking up new skills are long gone. Many of us
enter the world of programming and web development knowing only one or
two technologies, like Java, C++, or JavaScript, but that is no longer enough.
Before now, web developers used to work in groups on specialized projects,
such as front-end development carried out by a different team of
programmers and back-end development written by a different team of
programmers, also referred to as server-side developers.
Nowadays, everyone is looking for full-stack developers, someone who is
knowledgeable in both front-end and back-end technology and can work
independently to develop a fully functional web application.
Two ways that people can use a computer to make websites are Django and
Flask. Web developers use two different programs to create sites and web
apps. These two programs are called frameworks, and they help people make
fun, cool sites that look nice and run fast. Django is one of the top
frameworks because it is open source and works well. But you must learn
about web apps to build different web pages and website templates. You will
need to create different apps from scratch to develop a single web app. The
second way, Flask, is simpler and easier.
Flask is a newer framework that is easier to learn for building simple web
apps. That is a lovely place to start learning web development.
That is why you should be happy that you are on this journey to learn how to
build websites and web apps with Flask and Django. Two in one!
Learning a framework that complements your primary area of expertise is
preferable. For example, a Python developer would learn more from Django
and Flask than from Angular. Similarly, a JavaScript developer would learn
React and Node JS better than Django and Node JS. This book is only for
developers who are familiar with Python programming language.
Full-stack development with Python
The Python programming language has many advantages, one of which is a
relatively quick development cycle. The career opportunities that Python as a
full-stack engineer may open up for you, however, may be its best feature.
Full-stack and back-end Python engineers are still needed. Python is
frequently used in data science and machine learning, so as a full-stack
engineer, you can add these to your repertoire of back-end skills.
Back-end development using Python
Flask, Django, Turbogears, CherryPy, Pyramid, Bottle, and Falcon are just a
few Python back-end frameworks. However, we'll talk about Django and
Flask, the two most widely used frameworks.
Django
The developer community for the free and open-source project Django is
sizable. As a result, its security, user, and role management, as well as
database migration management feature, frequently improve. Additionally,
RESTful Web APIs are fully supported by the REST framework in Django.
Flask
Another well-liked Python web framework is Flask. It's referred to as a
micro-framework and is lighter than Django. The back end of APIs is
frequently developed using Flask. The Flask community has lots of pluggable
features available.
Front-end development using Python
Python front-end development is still in its infancy in comparison to back-
end development. Because of this, the front-end typically uses HTML,
JavaScript, and CSS. In this course, you will learn how to implement
Bootstrap with Django and Flask to create a beautiful front-end interface.
The first part of this book focuses on the Flask framework, and the latter part
discusses Django. We hope you find it interesting.
Typically, it should not take you more than a few weeks at most to learn
Flask and start to develop apps. However, that depends on your other
commitments and reasons for learning.
This book is divided into short chapters, which are isolated lessons. Many
teachers would write their books and tutorials as a long lesson where they
create an example app and update it throughout the book to demonstrate
concepts and tasks. That is not the case here. In this book, we include
examples in each lesson to illustrate the concepts, but we have examples from
other chapters that may not even be related to the previous. Hence, the book
is not meant to be combined into one large project.
This book will help you learn Flask by building a series of projects and
showing you verifiable screenshots so that you can use the skills to create
different projects with Flask. Please, as you read this book, I recommend
opening your computer and implementing the codes as we go. The lessons in
this book will help you create a web application on your own.
The second part of this book is for Django. Django is exciting if you are
interested in building websites. Django is a framework for making websites.
It saves you a lot of time and makes building websites easier and more fun.
Django makes it easy to build and maintain high-quality web applications.
Web development is a creative journey, fun-filled and full of adventure, with
enough stress to last a day! Django lets you focus on your web application's
fun and critical parts while making the tedious parts easier. In other words, it
