hello world in flask json is actually built on some basic structuresa collection of name/value pairs in which the name and value are separated buy colon ':and each pair can be separated by comma ',an ordered list of values that are encompassed in square brackets ('[]'this makes it very easy to build up structures that represent any set of datafor example book with an isbna titleauthor and price could be represented by"author""phoebe cooke""isbn" "price" "title""javain turn list of books can be represented by comma separated set of books within square brackets for example{"author""gryff smith","isbn" "price" "title""xml"}{"author""phoebe cooke""isbn" "price" "title""java"{"author""jason procter""isbn" "price" "title"" #"}implementing flask web service there are several steps involved in creating flask web servicethese are import flask initialise the flask application implement one or more functions (or methodsto support the services you wish to publish providing routing information to route from the url to function (or method start the web service running we will look at these steps in the rest of this simple service we will now create our hello world web service to do this we must first import the flask module in this example we will use the flask class and jsonify(function elements of the module