Scrapy Web Crawl Items

actual action script mobile.py:
import urlparse
from PIL import Image
from scrapy.exceptions import DropItem, NotConfigured, IgnoreRequest
from scrapy.spider import BaseSpider
from scrapy.contrib.spiders import CrawlSpider, Rule
from scrapy.contrib.linkextractors.sgml import SgmlLinkExtractor
from scrapy.contrib.loader import XPathItemLoader
from scrapy.selector import HtmlXPathSelector
from scrapy.http.request import Request

from scrapy.contrib.pipeline.images import ImagesPipeline
from mobile.items import Website

class MobileSpider(CrawlSpider):
    name = "mobile"
    allowed_domains = ["mobile-store.ro"]
    start_urls = ["http://www.mobile-store.ro/produse/"]
    rules = (
        Rule(SgmlLinkExtractor(allow=r"/produs/d+"), follow=True),
        Rule(SgmlLinkExtractor(allow=r"/produse/d+"), callback='parse_item')
    )

    def parse(self, response, response2):
        hxs = HtmlXPathSelector(response)
        next_page = hxs.select("//ul[@class='products']/li/a/@href").extract()
        if not not next_page:
            yield Request(next_page[0], self.parse)
        sites = hxs.select('//div[@id="wrapper"]/div[@id="content"]')
        items = []

        for site in sites:
            item = Website()
            item['nume'] = site.select('//div[@class="summary"]/h1[@class="product_title entry-title"]/text()').extract()
            item['categorie'] = site.select('//div[@class="summary"]/div[@class="product_meta"]/span[@class="posted_in"]/a/text()').extract()
            item['brand'] = site.select('//div[@class="summary"]/div[@class="product_meta"]/span[@class="tagged_as"]/a/text()').extract()
            item['descriere'] = site.select('//div[@class="woocommerce_tabs"]/div[@id="tab-description"]/p/text()').extract()
            image_relative_url = site.select('//div[@class="ad-image-wrapper"]/div[@class="ad-image"]/img[@class="lightbox"]/@src').extract()
            item['image_urls'] = [urlparse.urljoin(response.url,image_relative_url)]
            #item['image_urls'] = site.select('//div[@class="ad-image-wrapper"]/div[@class="ad-image"]/img[@class="lightbox"]/@src').extract()
            item['pret'] = site.select('//div[@class="summary"]/div[1]/p[@class="price"]/span[@class="amount"]/text()').extract()
            item['url'] = response.url
            items.append(item)
        for item in items:
            yield item

settings.py:
SPIDER_MODULES = ['mobile.spiders']
NEWSPIDER_MODULE = 'mobile.spiders'
DEFAULT_ITEM_CLASS = 'mobile.items.Website'

ITEM_PIPELINES = ['scrapy.contrib.pipeline.images.ImagesPipeline']

items.py:
from scrapy.item import Item, Field

class Website(Item):
    nume = Field()
    descriere = Field()
    categorie = Field()
    brand = Field()
    pret = Field()
    url = Field()
    image_urls = Field()
    images = Field()
    image_paths = Field()

pipelines.py:
from mobile.contrib.pipeline.images import ImagesPipeline
from scrapy.exceptions import DropItem
from scrapy.http import Request

class MyImagesPipeline(ImagesPipeline):

    def get_media_requests(self, item, info):
        for image_url in item['image_urls']:
            yield Request(image_url)

    def item_completed(self, results, item, info):
        image_paths = [x['path'] for ok, x in results if ok]
        if not image_paths:
            raise DropItem("Item contains no images")
        item['image_paths'] = image_paths
        return item