Enroll in our free course now and transform your Python skills into powerful, dynamic web applications. Don’t miss this opportunity to master the art of web development with Flask. You’ve run your application and displayed information on the web browser.

Web applications mainly use HTML to display information for the visitor, so you’ll now work on incorporating HTML files in your app, which can be displayed on the web browser. Now that you have your programming environment set up, you’ll start using Flask. In this step, you’ll make a small web application inside a Python file and run it to start the server, which will display some information on the browser. You’ve created the project folder, a virtual environment, and installed Flask.

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Empower your employees with the latest technology skills to support professional development at your organization. Videos are very informative with plenty of examples to help you get an understanding. DigitalOcean makes it simple to launch in the cloud and scale up Flask Framework for Python Developers Lessons as you grow – whether you’re running one virtual machine or ten thousand. To demonstrate how to handle errors, you will create a route that greets a user from a list of usernames. And here’s the GitHub repository codebase you will use as part of this tutorial.

In this step, you’ll create your main Flask application in a new file. Flask uses the Jinja template engine to dynamically build HTML pages using familiar Python concepts such as variables, loops, lists, and so on. As part of this tutorial, you’ll use the Bootstrap toolkit to style your application so it is more visually appealing. The toolkit will allow you to focus on learning how Flask works. You use the escape() function you imported earlier to render the word string as text.

return ‘Hi ‘.format(users[user_id])

That way, you’re installing any project dependencies not system-wide but only in your project’s virtual environment. 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. 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.

Functions like these are commonly referred to as views in Flask. In this case, the home view returns a «Hello, World!» string that the browser can display. In this section, you’ll spin up a development server and display «Hello, World!» in the browser with just a few lines of code.

Save and close the file, then create a new edit.html template:

Learning Flask will allow you to quickly create web applications in Python. You can take advantage of Python libraries to add advanced features to your web application, like storing your data in a database, or validating web forms. This course will be your complete definitive guide for developing fully functional websites with the Flask web framework. We’ll start with crash courses in the basic front end technologies for HTML, CSS, and Boostrap 4 before diving into Python and Flask.

Flask is a micro web framework written in Python that provides a simple way to create web applications. It’s a popular choice for developers due to its lightweight and flexible design, making it easy to build small to medium-sized applications. Armin Ronacher, who leads an international group of Python enthusiasts named Pocco, develops it. Flask is based on Werkzeug WSGI toolkit and Jinja2 template engine. Instead of adding the navigation menu code directly into base.html, you include _navigation.html in your website’s header.

In this step, you’ll use dynamic routes to allow users to interact with the application. You’ll make a route that capitalizes words passed through the URL, and a route that adds two numbers together and displays the result. By adding the CSS file reference to base.html, you’re again taking advantage of the inheritance mechanism that Jinja templates provide.