import XenAPI

url = 'https://citrixexample.company.com'
user = 'USERNAME'
password = 'PASSWORD'

session = XenAPI.Session (url)
session.xenapi.login_with_password(user, password, '1.0', 'scriptname')

xmlrpclib.ProtocolError: <ProtocolError for citrixexample.company.com/RPC2: 404 Not Found>

import XenAPI

url = 'https://citrixexample.company.com/Citrix/XenApp'
user = 'USERNAME'
password = 'PASSWORD'

session = XenAPI.Session (url)
session.xenapi.login_with_password(user, password, '1.0', 'scriptname')

xmlrpclib.ProtocolError: <ProtocolError for citrixexample.company.com/Citrix/XenApp: 405 Method Not Allowed>