text: '''Example app lifted from https://docs.docker.com/compose/gettingstarted/
  '''
  
  import time
  
  import redis
  from flask import Flask
  
  
  app = Flask(__name__)
  cache = redis.Redis(host='redis', port=6379)
  
  
  def get_hit_count():
      retries = 5
      while True:
          try:
              return cache.incr('hits')
          except redis.exceptions.ConnectionError as exc:
              if retries == 0:
                  raise exc
              retries -= 1
              time.sleep(0.5)
  
  
  @app.route('/')
  def hello():
      count = get_hit_count()
      return 'Hello World! I have been seen {} times.\n'.format(count)
  
  
  if __name__ == "__main__":
      app.run(host="0.0.0.0", debug=True)
  