old_contents: """
  Copyright 2016 Brian Quach
  Licensed under MIT (https://github.com/brianquach/udacity-nano-fullstack-catalog/blob/master/LICENSE)  # noqa
  """
  import json
  from flask import Flask
  from flask_sqlalchemy import SQLAlchemy
  from oauth2client.file import Storage
  
  G_CREDENTIAL_STORAGE = Storage('credential_storage')
  
  # This app's client Id to generate an access token from Google's OAuth API
  CLIENT_ID = json.loads(
      open('client_secrets.json', 'r').read()
  )['web']['client_id']
  
  app = Flask(__name__)
  app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///catalog.db'
  app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
  db = SQLAlchemy(app)
  
  from catalog import views  # noqa
  
new_contents: """
  Copyright 2016 Brian Quach
  Licensed under MIT (https://github.com/brianquach/udacity-nano-fullstack-catalog/blob/master/LICENSE)  # noqa
  """
  import json
  from flask import Flask
  from flask_sqlalchemy import SQLAlchemy
  from oauth2client.file import Storage
  
  
  # Used to store and retrieve google's credential object for api calls
  G_CREDENTIAL_STORAGE = Storage('credential_storage')
  
  # This app's client Id to generate an access token from Google's OAuth API
  CLIENT_ID = json.loads(
      open('client_secrets.json', 'r').read()
  )['web']['client_id']
  
  app = Flask(__name__)
  app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///catalog.db'
  app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
  db = SQLAlchemy(app)
  
  from catalog import views  # noqa
  
subject: add comment explaning google storage