Build a Scalable Flask Web Project From Scratch

Build a Scalable Flask Web Project From Scratch
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Flask is a powerful and flexible micro web framework for Python, ideal for both small and large web projects. It provides a straightforward way to get a web application up and running, with all the features that you need to get started.

Over the course of this tutorial, you’ll explore the process of creating a boilerplate for a Flask web project. This boilerplate will serve as a great starting point for any scalable Flask web app that you wish to develop in the future, from basic web pages to complex web applications.

In this tutorial, you’ll learn how to:

  • Set up a Flask project
  • Create a "Hello, World!" Flask app
  • Add multiple pages with blueprints
  • Leverage Jinja templates
  • Store static files

At the end of this tutorial, you’ll have created a working Flask web application that you can use to bootstrap your future Flask projects.


You don’t need any previous knowledge of Flask to complete this project. If you want to learn more about the topics that you encounter in this tutorial, then you’ll find links to resources along the way.

However, you should be comfortable using the terminal and have basic knowledge of Python. Although it helps to know about virtual environments and pip, you’ll learn how to set everything up as you work through the tutorial.

Project Overview

In this tutorial, you’ll start building a Flask project, which could become a public message board at some point. Here’s what the project will look at the end of this tutorial:

You create a basic Flask project with two pages that inherit content and style from a parent template.

The Flask project that you’ll build in this tutorial will be very generic. That way, it’s the perfect base for any of your future projects. For example, maybe you’ll want to add a database or implement logging and notification messages.

Get Started

In this section, you’ll prepare the development environment for your Flask project. First, you’ll create a virtual environment and install all the dependencies that you need for your project.

Create a Virtual Environment

In this section, you’ll build your project structure. You can name the root folder of your project any way you like. For example, you could name it rp_flask_board/ if your ultimate goal is to create a message board. If you have another project in mind, then feel free to name your folder accordingly. Create your folder and navigate into it:

$ mkdir rp_flask_board
$ cd rp_flask_board

In this case, you name the root folder of your project rp_flask_board/. The files and folders that you create over the course of this series will be located in either this folder or its subfolders.

After you navigate to the project folder, it’s a good idea to create and activate a virtual environment. That way, you’re installing any project dependencies not system-wide but only in your project’s virtual environment.

Select your operating system below and use your platform-specific command to set up a virtual environment:

Windows PowerShell
PS> python -m venv venv
PS> .\venv\Scripts\activate
(venv) PS>
$ python -m venv venv
$ source venv/bin/activate
(venv) $

With the commands shown above, you create and activate a virtual environment named venv by using Python’s built-in venv module. The parenthesized (venv) in front of the prompt indicates that you’ve successfully activated the virtual environment.

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December 13, 2023 at 07:30PM
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