old_contents: from flask import Flask, jsonify
  from flask.helpers import make_response
  
  import urls
  import scrapy
  
  app = Flask(__name__)
  
  @app.route('/fuelprice/v1.0/petrol/', methods=['GET'])
  def petrol_prices_all():
      all_petrol_prices = scrapy.scrape_all_petrol_prices()
      return make_response(jsonify(all_petrol_prices))
  
  
  @app.route('/fuelprice/v1.0/petrol/<string:city_name>', methods=['GET'])
  def petrol_price(city_name):
      url = urls.petrol_url(city_name)
      price = scrapy.scrape_latest_petrol_price(url)
      return make_response(jsonify({city_name.title() : price}))
      
  @app.errorhandler(404)
  def not_found(error):
      return make_response(jsonify({'error': 'Not found'}))
  
  @app.route('/')
  def index():
      return "Hello, World!"
  
  if __name__ == '__main__':
      app.run(debug=True)
  
new_contents: from flask import Flask, jsonify
  from flask.helpers import make_response
  
  import urls
  import scrapy
  
  app = Flask(__name__)
  
  @app.route('/fuelprice/v1.0/petrol/', methods=['GET'])
  def petrol_prices_all():
      all_petrol_prices = scrapy.scrape_all_petrol_prices()
      return make_response(jsonify(all_petrol_prices))
  
  @app.route('/fuelprice/v1.0/petrol/<string:city_name>', methods=['GET'])
  def petrol_price(city_name):
      url = urls.petrol_url(city_name.lower())
      price = scrapy.scrape_latest_petrol_price(url)
      return make_response(jsonify({city_name.title() : price}))
      
  @app.errorhandler(404)
  def not_found(error):
      return make_response(jsonify({'error': 'Not found'}))
  
  @app.route('/')
  def index():
      return "Hello, World!"
  
  if __name__ == '__main__':
      app.run(debug=True)
  
subject: Handle different cases of city names