Author: Zen and the Art of Computer Programming
1 Introduction
What is Flask?
Flask is a lightweight web application framework based on Python, which can help developers write web applications quickly and concisely. Flask supports a variety of functional features, such as route mapping, template rendering, database interaction, identity authentication, etc.
Why use Flask?
- Lightweight: Flask is considered a more lightweight web framework. Compared to other web frameworks such as Django or Tornado, Flask's performance is better. For small projects, Flask is a good choice.
- Easy to use: Flask is simple and easy to understand, with a gentle learning curve. Because Flask uses the WSGI (Web Server Gateway Interface) protocol, it is easier to deploy and debug.
- Modularization: Flask modules communicate through standardized interfaces to achieve module interconnection. For example, Flask-SQLAlchemy is an extension library of Flask that provides object-relational mapping (ORM) so that developers can easily operate the database.
- Strong scalability: Flask has good scalability, and there are many third-party libraries on Github that provide many extensions. For example, the Flask-Login extension library allows developers to implement user login functions, and the Flask-WTF extension library can easily implement form verification.
- Support RESTful API: Flask has built-in RESTful API support.
- Complete documentation: Flask officially provides a wealth of documentation and examples. Developers can quickly master the use of Flask by reading the documentation and reference examples.
How to install Flask?
Flask can be installed directly using the pip command. The installation process is as follows: