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Mercifully pronounced “whiskey,” this stands for ​​Web Server Gateway Interface. Essentially, this is a way for web servers to pass requests to web applications or frameworks. Flask relies on the WSGI external library to function, as well as the Jinja2 template engine.

Web development can be a complex beast, especially when you’re dealing with a powerful language like Python. But, just like a skilled craftsman has a toolbox full of tools, Python developers have Flask. Testing Fast API and Flask applications is easy and enjoyable with Apidog.

Develop Your First Flask App (Coming Soon)

You pass the value ‘/’ to @app.route() to signify that this function will respond to web requests for the URL /, which is the main URL. By adding the CSS file reference to base.html, you’re again taking advantage of the inheritance mechanism that Jinja templates provide. You only need to add styles.css in your base template to make it present in your child templates. With your base and child template structure, it’s best to add the code for the navigation menu into base.html. Your current project structure is great for starting a Flask project. However, if you want to work on bigger projects, this structure can be limiting because you’d need to add more and more code to

You can download and keep any of your created files from the Guided Project. To do so, you can use the “File Browser” feature while you are accessing your cloud desktop. The templates in your project provide the logic and structure for the front end of your project.


Flask is a microframework for developers, designed to enable them to create and scale web apps quickly and simply. Explaining how they go about doing that will take a little more unraveling. The file layout.html defines an empty block, named content, that a child template can fill in. The file home.html is a child template that inherits the Flask Framework for Python Developers Lessons markup from layout.html and fills in the “content” block with its own text. In other words, layout.html defines all of the common elements of your site, while each child template customizes it with its own content. Now that we know our way around the project structure we set up, let’s get started with making a home page for our web app.

  • If you are looking for information on a specific function, class or
    method, this part of the documentation is for you.
  • Make sure your server is properly configured for your Flask application.
  • This minimalist philosophy grants developers the freedom to customize their applications according to project requirements.
  • Flask has a much smaller and less organized community compared to Django, so if you’re stuck on something, you’re less likely to find a fix on a forum, and there are fewer active users to ask for help.

Flask uses the Jinja template engine to dynamically build HTML pages using familiar Python concepts such as variables, loops, lists, and so on. You’ll learn by doing through completing tasks in a split-screen environment directly in your browser. On the left side of the screen, you’ll complete the task in your workspace. On the right side of the screen, you’ll watch an instructor walk you through the project, step-by-step.

How To Build an Inventory Management Dashboard

From rapid prototyping to robust customization, Flask’s attributes make it an invaluable asset for tackling a wide range of development challenges. Its flexibility allows you to define routes and endpoints logically, facilitating the creation of APIs that communicate seamlessly with other services. This feature is particularly beneficial when building applications that require interaction with external systems or data sources. Despite its lightweight nature, Flask doesn’t compromise on scalability.

Flask Framework for Python Developers Lessons

This can be due to a variety of reasons, such as incorrect configuration or misunderstanding of the ORM syntax. As with any tool, using Flask in Python is not without its challenges. You may encounter issues with routing, database integration, or deployment. CareerFoundry is an online school for people looking to switch to a rewarding career in tech. Select a program, get paired with an expert mentor and tutor, and become a job-ready designer, developer, or analyst from scratch, or your money back.