from jira.client import JIRA
import json
options = {
'server': 'https://some.server.net/jira12/projects/XXXX',
 }
USERNAME=input("Enter your username: ")
PASSWORD=input("Enter your password: ")
jira = JIRA(options, basic_auth=(USERNAME, PASSWORD))
issue = jira.issue('XXXX-260', expand='changelog')