равил код, основанный на решениях, предложенных ниже великими людьми здесь; Я получаю ошибку, показанную ниже кода здесь.

from scrapy.spider import BaseSpider
from scrapy.selector import HtmlXPathSelector
from scrapy.utils.response import get_base_url
from scrapy.utils.url import urljoin_rfc
from dmoz2.items import DmozItem

class DmozSpider(BaseSpider):
   name = "namastecopy2"
   allowed_domains = ["namastefoods.com"]
   start_urls = [
    "http://www.namastefoods.com/products/cgi-bin/products.cgi?Function=show&Category_Id=4&Id=1",
    "http://www.namastefoods.com/products/cgi-bin/products.cgi?Function=show&Category_Id=4&Id=12",    

]

def parse(self, response):
    hxs = HtmlXPathSelector(response)
    sites = hxs.select('/html/body/div/div[2]/table/tr/td[2]/table/tr')
    items = []
    for site in sites:
        item = DmozItem()
        item['manufacturer'] = 'Namaste Foods'
        item['productname'] = site.select('td/h1/text()').extract()
        item['description'] = site.select('//*[@id="info-col"]/p[7]/strong/text()').extract()
        item['ingredients'] = site.select('td[1]/table/tr/td[2]/text()').extract()
        item['ninfo'] = site.select('td[2]/ul/li[3]/img/@src').extract()
        #insert code that will save the above image path for ninfo as an absolute path
        base_url = get_base_url(response)
        relative_url = site.select('//*[@id="showImage"]/@src').extract()
        item['image_urls'] = urljoin_rfc(base_url, relative_url)
        items.append(item)
    return items

Мой items.py выглядит так:

from scrapy.item import Item, Field

class DmozItem(Item):
    # define the fields for your item here like:
    productid = Field()
    manufacturer = Field()
    productname = Field()
    description = Field()
    ingredients = Field()
    ninfo = Field()
    imagename = Field()
    image_paths = Field()
    relative_images = Field()
    image_urls = Field()
    pass

Мне нужны относительные пути, которые паук получает для элементов ['lative_images '], преобразованных в абсолютные пути и сохраненных в элементах [' image_urls '], чтобы я мог загружать изображения из самого этого паука. Например, путь относительных_изображений, который выбирает паук, - «../../files/images/small/8270-BrowniesHiResClip.jpg», его следует преобразовать в «http://namastefoods.com/files/images/small». /8270-BrowniesHiResClip.jpg ', и хранится в элементах [' image_urls ']

Мне также понадобится путь items ['ninfo'], который будет храниться как абсолютный путь.

Ошибка при запуске вышеуказанного кода:

2011-06-28 17:18:11-0400 [scrapy] INFO: Scrapy 0.12.0.2541 started (bot: dmoz2)
2011-06-28 17:18:11-0400 [scrapy] DEBUG: Enabled extensions: TelnetConsole, SpiderContext, WebService, CoreStats, CloseSpider
2011-06-28 17:18:11-0400 [scrapy] DEBUG: Enabled scheduler middlewares: DuplicatesFilterMiddleware
2011-06-28 17:18:11-0400 [scrapy] DEBUG: Enabled downloader middlewares: HttpAuthMiddleware, DownloadTimeoutMiddleware, UserAgentMiddleware, RetryMiddleware, DefaultHeadersMiddleware, RedirectMiddleware, CookiesMiddleware, HttpCompressionMiddleware, DownloaderStats
2011-06-28 17:18:11-0400 [scrapy] DEBUG: Enabled spider middlewares: HttpErrorMiddleware, OffsiteMiddleware, RefererMiddleware, UrlLengthMiddleware, DepthMiddleware
2011-06-28 17:18:11-0400 [scrapy] DEBUG: Enabled item pipelines: MyImagesPipeline
2011-06-28 17:18:11-0400 [scrapy] DEBUG: Telnet console listening on 0.0.0.0:6023
2011-06-28 17:18:11-0400 [scrapy] DEBUG: Web service listening on 0.0.0.0:6080
2011-06-28 17:18:11-0400 [namastecopy2] INFO: Spider opened
2011-06-28 17:18:12-0400 [namastecopy2] DEBUG: Crawled (200) <GET http://www.namastefoods.com/products/cgi-bin/products.cgi?Function=show&Category_Id=4&Id=12> (referer: None)
2011-06-28 17:18:12-0400 [namastecopy2] ERROR: Spider error processing <http://www.namastefoods.com/products/cgi-bin/products.cgi?Function=show&Category_Id=4&Id=12> (referer: <None>)
    Traceback (most recent call last):
      File "/System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/twisted/internet/base.py", line 1137, in mainLoop
        self.runUntilCurrent()
      File "/System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/twisted/internet/base.py", line 757, in runUntilCurrent
        call.func(*call.args, **call.kw)
      File "/System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/twisted/internet/defer.py", line 243, in callback
        self._startRunCallbacks(result)
      File "/System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/twisted/internet/defer.py", line 312, in _startRunCallbacks
        self._runCallbacks()
    --- <exception caught here> ---
      File "/System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/twisted/internet/defer.py", line 328, in _runCallbacks
        self.result = callback(self.result, *args, **kw)
      File "/***/***/***/***/***/***/spiders/namaste_copy2.py", line 30, in parse
        item['image_urls'] = urljoin_rfc(base_url, relative_url)
      File "/Library/Python/2.6/site-packages/Scrapy-0.12.0.2541-py2.6.egg/scrapy/utils/url.py", line 37, in urljoin_rfc
        unicode_to_str(ref, encoding))
      File "/Library/Python/2.6/site-packages/Scrapy-0.12.0.2541-py2.6.egg/scrapy/utils/python.py", line 96, in unicode_to_str
        raise TypeError('unicode_to_str must receive a unicode or str object, got %s' % type(text).__name__)
    exceptions.TypeError: unicode_to_str must receive a unicode or str object, got list

2011-06-28 17:18:15-0400 [namastecopy2] DEBUG: Crawled (200) <GET http://www.namastefoods.com/products/cgi-bin/products.cgi?Function=show&Category_Id=4&Id=1> (referer: None)
2011-06-28 17:18:15-0400 [namastecopy2] ERROR: Spider error processing <http://www.namastefoods.com/products/cgi-bin/products.cgi?Function=show&Category_Id=4&Id=1> (referer: <None>)
    Traceback (most recent call last):
      File "/System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/twisted/internet/base.py", line 1137, in mainLoop
        self.runUntilCurrent()
      File "/System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/twisted/internet/base.py", line 757, in runUntilCurrent
        call.func(*call.args, **call.kw)
      File "/System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/twisted/internet/defer.py", line 243, in callback
        self._startRunCallbacks(result)
      File "/System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/twisted/internet/defer.py", line 312, in _startRunCallbacks
        self._runCallbacks()
    --- <exception caught here> ---
      File "/System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/twisted/internet/defer.py", line 328, in _runCallbacks
        self.result = callback(self.result, *args, **kw)
      File "/***/***/***/***/***/***/spiders/namaste_copy2.py", line 30, in parse
        item['image_urls'] = urljoin_rfc(base_url, relative_url)
      File "/Library/Python/2.6/site-packages/Scrapy-0.12.0.2541-py2.6.egg/scrapy/utils/url.py", line 37, in urljoin_rfc
        unicode_to_str(ref, encoding))
      File "/Library/Python/2.6/site-packages/Scrapy-0.12.0.2541-py2.6.egg/scrapy/utils/python.py", line 96, in unicode_to_str
        raise TypeError('unicode_to_str must receive a unicode or str object, got %s' % type(text).__name__)
    exceptions.TypeError: unicode_to_str must receive a unicode or str object, got list

2    011-06-28 17:18:15-0400 [namastecopy2] INFO: Closing spider (finished)
2011-06-28 17:18:15-0400 [namastecopy2] INFO: Spider closed (finished)

Thanks.-TM