From 0 to 1: Flask Project Development Process and Best Practices

This article introduces Flask, a lightweight Python web framework. First, its features are defined: concise and flexible, like a "toolbox," suitable for beginners and small-to-medium-sized projects. For the development environment, Python (3.7+) and Flask need to be installed, and a virtual environment should be created to avoid dependency conflicts. The project development process includes: creating a virtual environment, establishing a basic structure with app.py (entry point), static (static files), and templates (templates). The first "Hello World" example demonstrates route definition and starting the development server. Advanced content covers dynamic routing, Jinja2 template rendering, form handling (including flash message feedback), and Flask-SQLAlchemy database operations. Best practices emphasize configuration management (environment variables or config.py), blueprint for module splitting, error handling (404/500 pages), logging, and testing. Deployment recommends using gunicorn locally and cloud platforms like PythonAnywhere and Heroku. In summary, core concepts such as routes, templates, forms, databases, and project structure need to be mastered. Complexity can be enhanced through extensions (Celery, RESTful), and practice is key.