Flask-lightweight web framework

Example

The @app.route() decorator is used to bind a URL to a specific view function in Flask.

Scenario

In a simple blog application, you might create a route for the homepage using @app.route('/') to display a list of posts. Similarly, you could create individual post routes like @app.route('/post/<int:post_id>') to display detailed views of individual blog posts.

Example

Flask provides easy access to HTTP request data through the `request` object.

Scenario

In a contact form application, the user submits their message through a POST request. Flask can retrieve this data using `request.form['message']` and then process it, like sending an email or saving it to a database.

Example

Flask uses the Jinja2 templating engine to render HTML templates with dynamic content.

Scenario

In an e-commerce website, Flask could use Jinja2 templates to render product pages with details pulled from a database. For instance, you can display product names, prices, and descriptions dynamically using templates: {{ product.name }}.

Example

Flask provides built-in session management to store user-specific data across requests.

Scenario

In a shopping cart application, Flask can store cart data in a session. For example, when a user adds an item to their cart, this information is saved in a session that persists between requests, allowing the user to navigate the site without losing their cart data.

Example

Flask has a rich ecosystem of extensions like Flask-SQLAlchemy for database integration, Flask-Login for authentication, and Flask-Mail for sending emails.

Scenario

For a social networking site, you might use Flask-SQLAlchemy to handle user and post databases, Flask-Login to manage user sessions and authentication, and Flask-Mail to send notifications or email verifications.