我刚刚开始了解scrapy.现在我正在尝试通过以下教程进行爬网.但我很难从div抓取文本.

这是items.py

from scrapy.item import Item,Fied
class DmozItem(Item):
    name = Field()
    title = Field()
    pass

这是dmoz_spider.py

from scrapy.spider import BaseSpider
from scrapy.selector import HtmlXPathSelector
from scrapy.item import Item

from dmoz.items import DmozItem

class DmozSpider(BaseSpider):
    name = "dmoz"
    allowed_domains = ["roxie.com"]
    start_urls = ["http://www.roxie.com/events/details.cfm?eventID=4921702B-9E3D-8678-50D614177545A594"]

    def parse(self,response):
            hxs = HtmlXPathSelector(response)
            sites = hxs.select('//div[@id="eventdescription"]')
            items = []
            for site in sites:
                    item = DmozItem()
                    item['name'] = hxs.select("text()").extract()
                    items.append(item)
            return items

现在我试图通过命令这个从顶级文件夹爬行：

scrapy crawl dmoz -o scraped_data.json -t json

但该文件仅使用'[‘创建.

它完美地在控制台中工作(通过命令每个选择),但不知何故它不能用作脚本.我真的是scrapy的首发.你们能告诉我如何获得“div”中的数据吗？提前致谢.

*此外,这是我得到的.

2013-06-19 08:43:56-0700 [scrapy] INFO: Scrapy 0.16.5 started (bot: dmoz)
/System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/twisted/web/microdom.py:181: SyntaxWarning: assertion is always true,perhaps remove parentheses?
assert (oldChild.parentNode is self,2013-06-19 08:43:56-0700 [scrapy] DEBUG: Enabled extensions: FeedExporter,LogStats,TelnetConsole,CloseSpider,WebService,CoreStats,SpiderState
2013-06-19 08:43:56-0700 [scrapy] DEBUG: Enabled downloader middlewares: HttpAuthMiddleware,DownloadTimeoutMiddleware,UserAgentMiddleware,RetryMiddleware,DefaultHeadersMiddleware,RedirectMiddleware,CookiesMiddleware,HttpCompressionMiddleware,ChunkedTransferMiddleware,DownloaderStats
2013-06-19 08:43:56-0700 [scrapy] DEBUG: Enabled spider middlewares: HttpErrorMiddleware,OffsiteMiddleware,RefererMiddleware,UrlLengthMiddleware,DepthMiddleware
2013-06-19 08:43:56-0700 [scrapy] DEBUG: Enabled item pipelines: 
2013-06-19 08:43:56-0700 [dmoz] INFO: Spider opened
2013-06-19 08:43:56-0700 [dmoz] INFO: Crawled 0 pages (at 0 pages/min),scraped 0 items (at 0 items/min)
2013-06-19 08:43:56-0700 [scrapy] DEBUG: Telnet console listening on 0.0.0.0:6023
2013-06-19 08:43:56-0700 [scrapy] DEBUG: Web service listening on 0.0.0.0:6080
2013-06-19 08:43:56-0700 [dmoz] DEBUG: Crawled (200)