Scrapy + Python : 抓取器不能保存为CSV文件

我得到的错误是 - click to see the error

我修改了下面的代码，我得到了一个错误 "csvwriter" is not defined .请帮助！!

import scrapy
import csv
class MyprojectSpider(scrapy.Spider):
   name = "travel"
   allowed_domains = ["mytravelexp.com"]
   start_urls = [
      "http://www.mytravelexp.com",
   fields = ['Link']
   filename = "travel.csv"
   with open(filename, 'w') as csvfile:
    csvwriter = csv.writer(csvfile)
    csvwriter.writerow(fields)
   def parse(self, response):