old_contents: # Imports
  import os
  import jinja2
  import webapp2
  import logging
  import json
  import urllib
  
  # this is used for constructing URLs to google's APIS
  from googleapiclient.discovery import build
  
  API_KEY = 'AIzaSyDrr-4elELZpZurOEVIK6hBsBf6WnSiySs'
  
  JINJA_ENVIRONMENT = jinja2.Environment(
      loader=jinja2.FileSystemLoader(os.path.dirname(__file__)),
      extensions=['jinja2.ext.autoescape'],
      autoescape=True)
  
  from flask import Flask
  app = Flask(__name__)
  app.config['DEBUG'] = True
  
  # Note: We don't need to call run() since our application is embedded within
  # the App Engine WSGI application server.
  
  
  @app.route('/')
  def hello():
      template = JINJA_ENVIRONMENT.get_template('templates/index.html')
      return template.render()
  
  
  @app.errorhandler(404)
  def page_not_found(e):
      """Return a custom 404 error."""
      return 'Sorry, nothing at this URL.', 404
  
new_contents: # Imports
  import os
  import jinja2
  import webapp2
  import logging
  
  JINJA_ENVIRONMENT = jinja2.Environment(
      loader=jinja2.FileSystemLoader(os.path.dirname(__file__)),
      extensions=['jinja2.ext.autoescape'],
      autoescape=True)
  
  from flask import Flask
  app = Flask(__name__)
  app.config['DEBUG'] = True
  
  # Note: We don't need to call run() since our application is embedded within
  # the App Engine WSGI application server.
  
  
  @app.route('/')
  def hello():
      template = JINJA_ENVIRONMENT.get_template('templates/index.html')
      return template.render()
  
  
  @app.errorhandler(404)
  def page_not_found(e):
      """Return a custom 404 error."""
      return 'Sorry, nothing at this URL.', 404
  
subject: update main.py