old_contents: import uuid
  
  
  def make_arn_for_topic(account_id, name):
      return "arn:aws:sns:us-east-1:{}:{}".format(account_id, name)
  
  
  def make_arn_for_subscription(topic_arn):
      subscription_id = uuid.uuid4()
      return "{}:{}".format(topic_arn, subscription_id)
  
new_contents: import uuid
  
  
  def make_arn_for_topic(account_id, name):
      return "arn:aws:sns:us-east-1:{0}:{1}".format(account_id, name)
  
  
  def make_arn_for_subscription(topic_arn):
      subscription_id = uuid.uuid4()
      return "{0}:{1}".format(topic_arn, subscription_id)
  
subject: Fix string formatting for py26