hello world in flask the final solution we can tidy this example up little by defining function hat can be used to create the flask application object and by ensuring that we only run the application if the code is being run as the main modulefrom flask import flaskjsonifyurl_for def create_service()app flask(__name__@app route('/hello'methods=['get']def welcome()return jsonify({'msg''hello flask world'}with app test_request_context()print(url_for('welcome')return app if __name__ ='__main__'app create_service(app run(debug=trueone feature we have added to this program is the use of the test_request_context(the test request context object returned implements the context manager protocol and thus can be used via with statementthis is useful for debugging purposes it can be used to verify the url used for any functions with routing information specified in this case the output from the print statement is '/helloas this is the url defined by the @app route decorator online resources see the following online resources for information on the topics in this ph thesisif you are interesting in the background to rest read this frameworks for python