old_contents: # test.py
  def application(env, start_response):
      start_response('200 OK', [('Content-Type', 'text/html')])
      #return [b"Hello World"] # python3
      return ["Hello World from default uWSGI app (default)"] # python2
  
new_contents: def application(env, start_response):
      start_response('200 OK', [('Content-Type', 'text/html')])
      return ["Hello World from a default Nginx uWSGI Python 2.7 app in a\
              Docker container (default)"]
  
subject: Clean code in python2.7