Template inheritance is a template management mechanism that is similar to object-oriented programming. Because each template only contains the differences from the template it extends, template management is kept simple and efficient.
After you've enabled your environment and installed Flask, you can begin developing your application. On the index page, the first step is to display a message that welcomes visitors. To provide an HTML template as the response, you'll utilise Flask's render template() utility function.
Templates are files that contain both static and dynamic data placeholders. To create a finished document, a template is rendered with precise data. The Jinja template library is used by Flask to render templates. Templates will be used in your application to render HTML that will be shown in the user's browser.
Inheriting from a template class is feasible. All of the regular inheritance and polymorphism rules apply. If we want the new, derived class to be general, we should make it a template class with a template argument that we send to the base class.