Python JSON dictionaries

import json
x = '{"first_name":"Jack", "last_name":"Jonas"}'
y = '{"first_name":"James", "last_name":"Johnson"}'
z = '{"first_name":"Jude", "last_name":"Jonathon"}'
#this is another way of creating a python dictionary - see this script for more information: https://pastebin.com/bf6VBk4X