Flask is a micro web framework written in Python. It is classified as a microframework because it does not require particular tools or libraries. It has no database abstraction layer, form validation, or any other components where pre-existing third-party libraries provide common functions. However, Flask supports extensions that can add application features as if they were implemented in Flask itself. Extensions exist for object-relational mappers, form validation, upload handling, various open authentication technologies and several common framework related tools.
Flask is a web development framework developed in Python. It is easy to learn and use. Flask is “beginner-friendly” because it does not have boilerplate code or dependencies, which can distract from the primary function of an application.
- Minimalistic and Lightweight: Flask is known as a "micro" framework because it doesn't come with built-in components like ORM, authentication, or form validation (which frameworks like Django provide). This minimalist approach means that developers can add only what is needed, making it more flexible.
- Routing System: Flask has a built-in routing system that maps URLs to Python functions. These functions are called view functions or routes and are responsible for handling requests and returning responses. Flask uses decorators to bind routes to functions in an elegant and readable way.
- Templating with Jinja2: Flask uses Jinja2 as its templating engine, which allows you to embed dynamic content within HTML templates. It supports features like inheritance, macros, and filters, making it a powerful tool for generating HTML dynamically.
- Request and Response Objects: Flask uses request and response objects to handle HTTP requests and responses. The request object contains data about the current request, such as form data, query parameters, and cookies, while the response object holds the data to be sent back to the client.
- Built-in Development Server: Flask provides a built-in development server that allows developers to quickly test their applications locally without needing a third-party server or external deployment configurations.
- Support for RESTful APIs: Flask makes it easy to create RESTful APIs with simple route configurations. It's often used for building APIs that can be consumed by mobile apps, front-end frameworks, or other services.
- Flask is a powerful framework that combines simplicity with flexibility, making it a great choice for developers who want full control over their application structure. Whether you're building a small app, a RESTful API, or a larger project, Flask offers the tools and extensibility you need to get the job done efficiently. Its widespread adoption, strong community, and extensive documentation ensure that Flask remains one of the top choices for Python web development.
