Sessions are used in web development to store and retrieve information on a per-user basis. This is useful for implementing features like shopping carts or user authentication. When a user’s session is created, the server generates a unique session ID and stores it in a cookie on the user’s device. When the user makes subsequent […]

Jinja2 is a powerful and widely-used template engine for the Python programming language. It is designed to be fast, flexible, and secure, and it is widely used in web development as well as other contexts. Jinja2 is designed to be easy to use, and it allows developers to create dynamic templates that can be rendered […]

In applications built for the web, it’s important to react to the data a client sends to the server. In Flask this information is supplied by the global request object. To access Flask request data, you can use the request object. This object contains all the information about the incoming request, including the data sent […]

In Flask, routing refers to the process of mapping URLs to functions that should be executed when those URLs are requested. Flask uses a system of “routes” to determine which function to execute for a given URL. To define a route in Flask, you use the @app.route() decorator. This decorator takes the URL pattern as […]

When displaying user-generated content on a web page, it is important to properly escape any potentially dangerous characters to prevent security vulnerabilities. This is known as “escaping” the HTML. In Flask, you can escape HTML using the escape() function from the cgi module. This function replaces certain characters with their HTML entity equivalents, which makes […]

In Flask just like in most web development frameworks, you can make use of base templates and the extending of templates to reduce repetitive markup. In other words, you can have a base HTML file and have components from that shown on every single webpage. We can refactor some of the markups we have created […]

Flash messages are used in web applications to provide helpful feedback to users as they navigate a graphical user interface. You are likely familiar with flash messages if you have ever signed up for an account with any of the popular services available on the Internet today. These messages typically appear one time for a […]