The function enables us to pass variables from our view functions to the template for display or processing.īy default, Flask provides the following variables to the template context: The template context is available when rendering a template using the render_template() function. ![]() However, we’ll use **context notation to unpack the context dictionary. Then we pass the information to the render_template() function, with the template name index.html as the first argument and the context dictionary as the second argument. ![]() However, in this example, we create a context dictionary named context, which contains key–value pairs of our variables name and age. The example above is similar to the first one in terms of functionality. Here’s an example of a base template named base.html: return render_template ( 'index.html', **context ) Typically, it will include the section, the navigation menu, the footer, and any other elements that might be shared across the various pages of the web application. It will contain the common HTML structure and elements. To set up template inheritance, we start by creating a base template. The child templates inherit the structure and content of the base template and can override specific blocks to provide unique content for each page. This base template serves as a blueprint that can be extended and customized by the individual child templates. Template inheritance works by creating a base template that contains the common elements and structure of our web pages. Inheritance in the context of templates in Flask is a feature provided by Flask and the Jinja2 templating engine that enables us to define a base template and child templates. Inheritance in object-oriented programming is a concept that enables classes to inherit or acquire the properties and behaviors of another class. So, in summary, we create a template, place it in the templates directory, and then use the render_template() function to return the template to the user. In this example, this function will just return the template rendered by the render_template() function. Index() is the view function that will handle requests from the root URL. This promotes a consistent user interface across the application and saves us from duplication. Templates enable us to define reusable components, such as headers, footers, navigation bars, and other components that can be included on multiple pages. Some of the benefits of using templates in Flask are laid out below.Ĭode Reusability. This separation improves collaboration between developers and designers, allowing each team to work on different aspects of the application independently. By separating the presentation logic from the business logic, templates make it easier to manage and update a user interface without modifying the underlying application code. Templates are key in Flask, as they promote code organization, maintainability, and reusability. To get up to speed with the basics of Flask, check out this introduction to Flask. ![]() Note: this is an advanced article on Flask, so to get the most out of it you’ll need to have a basic understanding of how Flask works. Whether you’re a beginner or an experienced Flask developer, this deep dive into Flask templates will enhance your understanding and proficiency in building web interfaces. They enable us to create dynamic and interactive web pages by combining HTML with Python code.īy the end of this article, you’ll have a comprehensive understanding of Flask templates, and you’ll be equipped with the knowledge to create dynamic and visually appealing web applications using Flask. One of the key features of Flask is its powerful templating engine, which enables us to separate the presentation logic from the application logic in our web applications.įlask templates are built on the Jinja2 template engine. Linking CSS and JavaScript files in templatesįlask is a popular Python micro web framework that provides powerful tools for building dynamic web applications.Template Variables and Control Structures.Extending the base template in child templates.
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