old_contents: from flask import Flask
  
  app = Flask(__name__)
  
  
  @app.route('/')
  def home():
      return "yo"
  
  
  if __name__ == '__main__':
      app.run()
  
new_contents: #!/usr/bin/env python
  import os
  from flask import Flask
  
  app = Flask(__name__)
  
  
  getenv = lambda *names: {v: os.environ.get(v) for v in names}
  app.config.update(**getenv(
      'AUTH_TOKEN',
      'CELL_NUM',
      'MONGOLAB_URI',
      'TWILLIO_NUM',
  ))
  
  
  @app.route('/')
  def home():
      return "yo"
  
  
  if __name__ == '__main__':
      app.run(debug=True)
  
subject: add config import