old_contents: import os
  
  from fabric.api import env
  
  from fab_deploy import *
  
  from fab_deploy.amazon import *
  
  env.aws_access_key =  'xxx'
  env.aws_secret_key =  'xxx'
  setup_env(os.path.abspath(os.path.dirname(__file__)))
  
new_contents: import os
  
  from fabric.api import env
  
  from fab_deploy import *
  
  from fab_deploy.amazon import *
  
  env.AWS_CREDENTIAL = '/path/to/a/file'
  setup_env(os.path.abspath(os.path.dirname(__file__)))
  
subject: update amazon example fabfile