Flask Tutorial

What is Flask?

Explanation of Flask as a web framework.
History and origin of Flask.
Key features and benefits of using Flask.

Setting Up the Development Environment

Installing Python and pip.
Creating a virtual environment.
Installing Flask using pip.
Setting up a basic Flask project structure.

Your First Flask Application

Writing a “Hello, World!” Flask application.
Running the Flask development server.
Understanding the app.route decorator and URL routing.

Understanding Flask Routing

Defining routes and handling different HTTP methods (GET, POST).
Creating dynamic URLs with route parameters.
URL building with url_for.

Rendering Templates

Introduction to Jinja2 template engine.
Creating and rendering HTML templates with Flask.
Using template inheritance (base templates).
Passing data from Flask views to templates.

Working with Forms

Creating and handling HTML forms in Flask.
Validating form data using Flask-WTF.
Handling form submissions and displaying validation errors.
Redirecting users and displaying flash messages.

Working with Databases

Introduction to SQLAlchemy as Flask’s ORM.
Setting up a database connection with SQLAlchemy.
Defining models and performing CRUD operations.
Managing database migrations with Flask-Migrate.

User Authentication

Introduction to user authentication concepts.
Implementing user registration and login functionality.
Securing routes with login_required.
Managing user sessions with Flask-Login.

File Uploads and Handling

Setting up file uploads in a Flask application.
Validating and securing file uploads.
Serving uploaded files to users.
Storing and managing file paths in the database.

RESTful APIs with Flask

Introduction to RESTful API concepts.
Creating RESTful routes and handling JSON data.
Using Flask-RESTful to build APIs.
Testing and documenting APIs with Postman and Swagger.

Application Configuration and Deployment

Managing application configurations for different environments.
Using environment variables for sensitive data.
Deploying a Flask application to production (Heroku, AWS, etc.).
Configuring a production-ready web server (Gunicorn, Nginx).

Testing in Flask

Introduction to testing in Flask.
Writing unit tests for views and models.
Testing forms and API endpoints.
Running tests with pytest and generating test coverage reports.

Flask Extensions

Overview of popular Flask extensions (Flask-Mail, Flask-Admin, etc.).
Integrating Flask extensions into your application.
Customizing Flask extensions to fit your needs.

Handling Error Pages

Custom error pages for 404, 500, and other HTTP errors.
Logging errors and debugging in Flask.
Using Flask-DebugToolbar for in-depth debugging.

Planning the Project

Choosing a project idea (e.g., a blog, task manager, or e-commerce site).
Designing the database schema and application architecture.
Setting up the development environment and project structure.

Developing the Backend with Flask

Implementing models, views, and templates.
Adding user authentication and authorization.
Implementing key features (e.g., posting articles, managing tasks).

Developing the Frontend

Integrating a frontend framework (Bootstrap, Materialize, etc.).
Creating responsive layouts with Flask and CSS frameworks.
Handling AJAX requests with Flask and JavaScript (optional).

Deployment and Scaling

Preparing the application for deployment.
Deploying to a cloud provider (Heroku, AWS, etc.).
Setting up a database (PostgreSQL, MySQL) in production.
Implementing caching and scaling strategies.

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