Flask Tutorial

The request hits routes.py, which has code that maps the URL to a function. The function finds a template in the templates/ folder, renders it to HTML, and sends it back to the browser. Flask provides a render_template() helper function that allows use of the Jinja template engine.

• In the example above, we’re configuring the Flask application to run on all available network interfaces.
• A basic Flask application can be created in a single file in no time, whereas writing a “Hello World” in Django requires creating a few files and other preliminary steps.
• Follow our step-by-step tutorial to connect MongoDB with Django.
• As your Flask project grows, you have lots of view functions and other related bits of code that work together.

Jinja2 is a web template engine that combines a template with a certain data source to render dynamic web pages. In Easy Language, It combines a template (the layout of the page) with data (the specific information you want to show) to create a dynamic web page. Both frameworks are very popular, and you definitely need to know at least one of them to work in web development. At the same time, Django projects tend to have more concise and consistent architecture. This results in shorter onboarding times when developers join already running projects. Django is a complete framework, which results in a more challenging learning curve.

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Just make sure that the Enable django admin checkbox is selected when creating your Django project. Jinja2 has a more complex syntax, while Django templates are less flexible and more restricted. There’s hardly any difference for basic applications, but you may face some limitations if you need to perform advanced operations in your templates. If we only had to work with static HTML pages, that would be very easy, but most of today’s web applications include dynamic content.

The toolkit will allow you to focus on learning how Flask works. In the upcoming sections, you’ll add a navigation menu and style your web application. While doing so, notice how these additions can contribute to a better user experience. When you use url_for(), Flask creates the full URL to the given view for you.

from flask import Flask, render_template

Being inherently lightweight, Flask doesn’t offer any authentication or authorization features out of the box. However, there are extensions that can be integrated into your Flask application and work well together. For example, Flask-Admin provides an admin interface combined with ORM support, while Flask-Login and Flask-Security add the essential authentication features. To enable the admin app, add it to the list of installed apps in settings.py and provide a route for ‘admin/’ in urls.py. In PyCharm, Django admin is enabled by default and no additional steps are required.

In the case of a website, the templates are the HTML pages. A template language is one that we can use inside HTML so that the content on the HTML page becomes dynamic. In the preceding code block, you first import the Flask object from the flask package. You then use https://remotemode.net/ it to create your Flask application instance with the name app. You pass the special variable __name__ that holds the name of the current Python module. It’s used to tell the instance where it’s located—you need this because Flask sets up some paths behind the scenes.

cur.execute(“INSERT INTO posts (title, content) VALUES (?, ?)”,

Web templates remove repetition, separate content from design, and make your application easier to maintain. In other, simpler words, web templates are awesome, and you should use them! Flask uses the Jinja2 template engine; let’s see how to use it.

• Let’s explore these alternatives and see how they compare to Flask.
• The files and folders that you create over the course of this series will be located in either this folder or its subfolders.
• If you’re using PyCharm, you can benefit from its support for custom template tags.
• With Flask, you can easily create a bunch of lightweight apps, empowering each with only the tools and extensions it requires.

In addition to this, we also provide you with a list of Flask projects, FAQs, and interview questions for your future Interview. This is one more project-based course from Udemy, I recommend it to all people who want to learn Flask by building websites. In this course, you will not only learn about Flask but also how to flask developer use it in a real-world project. The best thing about the course is that the Instructor is clear and concise. It also includes a summary at the end of each lecture, which helps to retain the knowledge you have learned in the chapter. At the end of the course, you will build a fully functional blog application using Flask.

Build a JavaScript Front End for a Flask API

After registering your models in admin.py, you’ll be able to perform CRUD (create, read, update, delete) operations on them. It supports both users and user groups, and provides tools for granting and checking permissions. There are also a bunch of third-party packages for advanced authentication capabilities, including SSO, LDAP, and two-factor authentication.