text: #!/usr/bin/env python
  #
  # Copyright 2010 Google Inc.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  import logging
  import os
  
  version = os.environ.get('CURRENT_VERSION_ID', '').split('.')[0]
  
  if (__name__ == 'google.appengine.ext.mapreduce'
      and version != 'ah-builtin-python-bundle'):
    msg = ('You should not use the mapreduce library that is bundled with the'
           ' SDK. Use the one from'
           ' https://pypi.python.org/pypi/GoogleAppEngineMapReduce instead.')
    logging.warn(msg)
  
  