gistfile1.txt

#!/usr/bin/env python
import os
import sys
import pyrax

pyrax.set_setting('identity_type', 'rackspace')
pyrax.set_credentials('username', 'apikey')


dns = pyrax.cloud_dns
domains = dns.list()
for domain in domains:
  domain.update(ttl=300)
  records = domain.list_records()
  for record in records:
    record.update(ttl=300)