Flask is a popular web development framework for Python. It is a microframework that provides a simple and lightweight way to create web applications using Python. Flask is built on the Werkzeug WSGI toolkit and the Jinja2 template engine, and it offers a flexible and modular design that allows developers to create web applications quickly and easily.
To use Flask, you will need to install it on your system. You can do this using the pip package manager, by running the following command:
pip install Flask
Once Flask is installed, you can start using it to create web applications. Here is an example of a simple Flask application that returns a “Hello, World!” message when a user visits the application’s home page:
from flask import Flask
app = Flask(__name__)
@app.route('/')
def hello():
return 'Hello, World!'
Flask is based on the Werkzeug WSGI toolkit and the Jinja2 template engine. It provides a range of features and functionality that makes it easy to develop web applications, such as:
- A simple and lightweight design that allows developers to create web applications quickly and easily
- A built-in development server for testing and debugging applications
- Support for routing and URL building, allowing developers to define and handle different URLs in their application
- A built-in template engine for rendering HTML templates and generating responses
- Support for integrating with databases and other external resources, such as APIs
- Tools and libraries for common web development tasks, such as authentication, validation, and error handling