title: Scrapy does not write data to a file
body: <p>He created a spider in Scrapy:
  items.py:</p>
  
  <pre><code>from scrapy.item import Item, Field
  
  class dns_shopItem (Item):
       # Define the fields for your item here like:
       # Name = Field ()
       id = Field ()
       idd = Field ()
  </code></pre>
  
  <p>dns_shop_spider.py:</p>
  
  <pre><code>from scrapy.contrib.spiders import CrawlSpider, Rule
  from scrapy.contrib.linkextractors.sgml import SgmlLinkExtractor
  from scrapy.contrib.loader.processor import TakeFirst
  from scrapy.contrib.loader import XPathItemLoader
  from scrapy.selector import HtmlXPathSelector
  from dns_shop.items import dns_shopItem
   
  class dns_shopLoader (XPathItemLoader):
       default_output_processor = TakeFirst ()
   
  class dns_shopSpider (CrawlSpider):
      name = "dns_shop_spider"
      allowed_domains = ["www.playground.ru"]
      start_urls = ["http://www.playground.ru/files/stalker_clear_sky/"]
      rules = (
      Rule (SgmlLinkExtractor (allow = ('/ files / s_t_a_l_k_e_r_chistoe_nebo')), follow = True),
      Rule (SgmlLinkExtractor (allow = ('/ files / s_t_a_l_k_e_r_chistoe_nebo')), callback = 'parse_item'),
      )
  
      def parse_item (self, response):
          hxs = HtmlXPathSelector (response)
          l = dns_shopLoader (dns_shopItem (), hxs)
          l.add_xpath ('id', "/ html / body / table [2] / tbody / tr [5] / td [2] / table / tbody / tr / td / div [6] / h1/text ()" )
          l.add_xpath ('idd', "/ / html / body / table [2] / tbody / tr [5] / td [2] / table / tbody / tr / td / div [6] / h1/text () ")
          return l.load_item ()
  </code></pre>
  
  <p>Run the following command:</p>
  
  <pre><code>scrapy crawl dns_shop_spider-o scarped_data_utf8.csv-t csv
  </code></pre>
  
  <p>This log shows that Scrapy through all the necessary url, but why not write to the specified file when you start the spider. In what could be the problem?</p>