Flask is one of the most popular web development frameworks in Python. The new version Flask 3.0 comes with new features and enhancements that improve functionality and capabilities. In this article, we will discuss how to use JSON in Flask 3.0. JSON or JavaScript Object Notation is a lightweight format for data interchange that is easily readable by humans and machines.
One of the attractive features of Flask 3.0 is its improved handling of JSON. To work with JSON in Flask, we may need to use the flask.json module that helps us handle more sophisticated data in JSON format in our applications.
Here, we will create a simple code snippet to design a small API using Flask 3.0, which accepts and sends data in JSON format. This will help us better understand how to manage and manipulate JSON data in this version of Flask.
By studying this section, you will see how to design a simple Flask application to manage specific JSON data and implement CRUD operations using it.
Additionally, you will learn how to properly use suitable templates and HTTP responses related to JSON to enhance user experience.
from flask import Flask, jsonify, request\r\n\r\napp = Flask(__name__)\r\n\r\[email protected]('/data', methods=['GET'])\r\ndef get_data():\r\n data = {\'name\': \'Flask\', \'version\': \'3.0\'}\r\n return jsonify(data)\r\n\r\[email protected]('/echo', methods=['POST'])\r\ndef echo_data():\r\n content = request.json\r\n return jsonify(content)\r\n\r\nif __name__ == '__main__':\r\n app.run(debug=True)In this section of code, we start by creating an instance of the Flask class and then define two simple routes.
The statement @app.route('/data', methods=['GET']) defines a new route for accessing with the method GET.
def get_data():
the function get_data is of the HTTP type GET which returns JSON formatted data.
data = {'name': 'Flask', 'version': '3.0'}
we create a simple dictionary with the name and version of Flask.
return jsonify(data)
converts the data to JSON format and returns it.
@app.route('/echo', methods=['POST'])
defines another route for the POST method to handle incoming data.
content = request.json
receives the incoming JSON data.
return jsonify(content)
this retrieves the data and returns it to indicate how we can manage the received content.
app.run(debug=True)
runs the application in debug mode, which is useful for development.