Python Introduction to Web development using Flask

Congratulations, on running your first Flask application! If you had followed through all the steps, there wouldn’t be any errors in running the Flask application. Save this file and run this through the command prompt, just as you would any other python file. To start with a boilerplate application, let’s use the default as mentioned in the Flask documentation. Now you’ll install Python packages and isolate your project code away from the main Python system installation. An understanding of Python 3 concepts, such as data types, conditional statements, for loops, functions, and other such concepts.

  • We will have more control over the application development.
  • Here you’ll get the training and hands-on examples you need to get started building fully functional web applications and microservices using the Flask framework.
  • Become a qualified web developer in just 5-10 months—complete with a job guarantee.
  • Flask relies upon the Werkzeug WSGI toolbox and Jinja2 template.
  • If you want to get a running start developing a web application, Flask is the framework for you.

This is a complete hands-on course that will teach you everything you need to know about Flask to create a real-world web application. First, you will learn the basics of frontend technologies like HTML, CSS, Bootstrap, and Python. Once you are comfortable with those essential frontend techs, you will start exploring Flask. Once you have got a hold of Python, you start exploring Flask for building professional REST APIs with Python. You will learn about different Flask extensions like Flask-RESTful and Flask-SQLAlchemy and others to create a web application with very little code. JSON is a text-based data storage format that is designed to be easy to read for both humans and machines. JSON is generally the most common format for returning data through an API, XML being the second most common.

Advantages and disadvantages of Flask

Each module acts as an independent building block, which can execute one part of the functionality. Together this means that the whole constituent parts of the structure are flexible, moveable, and testable on their own. Not only is this helpful in terms of allowing your project to move in another direction easily, it also makes sure that the structure won’t collapse when a part is altered. The minimal nature of Flask and its aptitude for developing smaller web apps means that it’s even more flexible than Django itself. Size is everything, and Flask’s status as a microframework means that you can use it to grow a tech project such as a web app incredibly quickly.

Visualize your trip with Flask and Mapboxalong with theopen source flask_mapbox GitHub repositoryprovides a fantastic example visualization of a trip to Iceland with Flask as the backend web framework. The blog post series “Things which aren’t magic” covers how Flask’s ubiquitous @app.route decorator works under the covers. We’ve spent the lots of years helping over hundreds of job seekers just like yourself create and sustain a successful career in software industry. Flask is a light weight framework best suitable for microservices. Django is the most popular and trusted technology they developed in house. It is powering the most popular websites like Instagram, Pinterest, Discus, Spotify, BitBucket to name a few. You will go through various phases of product development, so you are ready to work in product-based companies.

Open a file called schema.sql inside your flask_blog directory:

The rest of the docs describe each component of Flask in detail, with a full reference in the APIsection. If you don’t know, Educative is a relatively new online learning platform that provides text-based courses and interactive coding on the browser, which makes for a great learning experience. But, before that, I must congratulate you on making the right choice. Python is the king of a programming language at the moment, and it has many frameworks and libraries to create a robust and scalable web application. These are the best online courses to learn the Flask framework for Python web developers. At this point, you’ve created a working, if limited, API. In the next section, we’ll allow users to find books via more specific data, such as an entry’s ID.

Is Flask worth learning 2022?

If you have a simple, innovative use case to be added to an existing application, Flask should be your choice as it offers flexibility. Flask comes with a small set of easy to learn API, and the documentation is excellent.

It is also called a micro framework because it’s lightweight and lets you build web services with very few overheads. With the Flask Developer track, you will learn about this framework and advance your knowledge of Python by building your own web applications. You’ve most likely gotten the sense by now that there are a lot of similarities between these two. It’s increasingly often that they are mentioned in the same breath. Both Flask and Django are designed to allow developers to get started easily with projects, as well as to scale them up quickly into applications.

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Get started with Installationand then get an overview with the Quickstart. There is also a more detailed Tutorial that shows how to create a small but complete application with Flask. Common patterns are described in thePatterns for Flask section.

Flask Framework for Python Developers Lessons

The examples are relevant to any web framework you will use and are easy to copy and paste to test in your own applications. Flask Blueprint templatesshows a way of structuring your file withblueprints for expanding projects into many files and modules. Flask Framework for Python Developers Lessons Flask’s success created a lot of additional work in issue tickets and pull requests. Armin eventually createdThe Pallets Projects collection of open source code libraries after he had been managing Flask under his own GitHub account for several years.

Using Flask-Login for User Management with Flask

As we can understand from the name that static routes are fixed routes i.e. for each route functionalities we have to explicitly define the same function for each URL route. This is the same sample re-worked to change the execution when GET HTTP method is called. Earlier, we were directly calling the `login.html` using `render_template()`. Now, we’re taking an input of username from the args attribute of Request object.

  • It also has a lot of community support in case you need extra help and create.
  • Just as strong readers often make strong writers, using APIs created by others and critically evaluating their implementation and documentation will help you better design your own APIs.
  • Based on the input of the `country` variable, `url_for()` method redirects it to the appropriate function call.
  • Flask is a web framework for Python, meaning that it provides functionality for building web applications, including managing HTTP requests and rendering templates.
  • A strong API can be considered the backbone of a potentially limitless number of projects or avenues of research.

Flask is a Python framework accessible under the BSD license inspired by the Sinatra Ruby framework. Flask relies upon the Werkzeug WSGI toolbox and Jinja2 template. The primary purpose is to help develop a robust web application base.


The file is a package that can be imported and executed. Create a new file in your favorite text editor and paste the following code in it.

Flask Framework for Python Developers Lessons

Posted by André Araújo