Python scrapy爬取数据异常求帮分析源码，pythonscrapy,由于业务需要，要爬托福1

Python scrapy爬取数据异常求帮分析源码，pythonscrapy,由于业务需要，要爬托福1

由于业务需要，要爬托福100网站的数据。源代码如下，我是参照网上scrapy教程写的：

#coding:utf-8from scrapy.spider import Spider,BaseSpiderfrom scrapy.http import Requestfrom scrapy.contrib.spiders import Rule,CrawlSpiderfrom scrapy.contrib.linkextractors import LinkExtractorfrom tpo.items import TpoItemfrom scrapy import logclass TPOSpider(Spider):    name = "tpo"    allowed_domains = ['http://toefl.100.com']    start_urls=[        "http://toefl.100.com/t/kouyu/1.html",  #设置起始url    ]    def parse(self,response):        url_list = list(set([ url for url in  response.xpath('//a/@href').extract() if url.startswith('http://toefl.100.com/t/kouyu/')]))        self.url_list = url_list        for url in self.url_list:            print url            yield Request(url, callback=self.parse_item)    def parse_item(self,response):        print 'call !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!'        item = TpoItem()        title = ','.join(response.xpath('//h3[6]/text()').extract())        question = ','.join(response.xpath('//div[@class="c-english"]/h6/text()').extract())        analysis1 = ','.join(response.xpath('//div[@class="c-cont c-separate no-b"]/text()').extract())        analysis2 = ','.join(response.xpath('//div[@class="c-cont c-separate "]/text()').extract())        sample_anser_part1 = response.xpath('//div[@class="no-b c-separate"]/text()').extract()        sample_anser_part2 = response.xpath('//div[@class=" c-separate"]/text()').extract()        sample_anser_part1.extend(sample_anser_part2)        sample_anser = ','.join(sample_anser_part1)        item["title"] = title.encode('utf-8')        item["question"] =question.encode('utf-8')        item["analysis1"] = analysis1.encode('utf-8')        item["analysis2"] = analysis2.encode('utf-8')        item["sample_anser"] = sample_anser.encode('utf-8')        yield item

思路是：
parse函数中先根据start_urls爬一个网页的数据，上面有所有要爬网页数据的url，然后把url都记录下来，然后对每一个url，都调用parse_item函数，取出里面的数据，parse_item里面定义了要取出哪些数据。
但是运行的时候根本就不会调用parse_item，这是运行的报告，请问错在什么地方？

D:\tpo\tpo>C:\Python27\Scripts\scrapy.exe crawl tpo2014-09-28 16:25:14+0800 [scrapy] INFO: Scrapy 0.24.4 started (bot: tpo)2014-09-28 16:25:14+0800 [scrapy] INFO: Optional features available: ssl, http, django2014-09-28 16:25:14+0800 [scrapy] INFO: Overridden settings: {'NEWSPIDER_MODUL: 'tpo.spiders', 'SPIDER_MODULES': ['tpo.spiders'], 'BOT_NAME': 'tpo'}2014-09-28 16:25:14+0800 [scrapy] INFO: Enabled extensions: LogStats, TelnetCoole, CloseSpider, WebService, CoreStats, SpiderState2014-09-28 16:25:14+0800 [scrapy] INFO: Enabled downloader middlewares: HttpAuMiddleware, DownloadTimeoutMiddleware, UserAgentMiddleware, RetryMiddleware, DaultHeadersMiddleware, MetaRefreshMiddleware, HttpCompressionMiddleware, RedirtMiddleware, CookiesMiddleware, ChunkedTransferMiddleware, DownloaderStats2014-09-28 16:25:14+0800 [scrapy] INFO: Enabled spider middlewares: HttpErrorMdleware, OffsiteMiddleware, RefererMiddleware, UrlLengthMiddleware, DepthMiddlare2014-09-28 16:25:14+0800 [scrapy] INFO: Enabled item pipelines: TpoPipeline2014-09-28 16:25:14+0800 [tpo] INFO: Spider opened2014-09-28 16:25:14+0800 [tpo] INFO: Crawled 0 pages (at 0 pages/min), scraped items (at 0 items/min)2014-09-28 16:25:14+0800 [scrapy] DEBUG: Telnet console listening on 127.0.0.10232014-09-28 16:25:14+0800 [scrapy] DEBUG: Web service listening on 127.0.0.1:602014-09-28 16:25:15+0800 [tpo] DEBUG: Crawled (200) <GET http://toefl.100.com/kouyu/1.html> (referer: None)2014-09-28 16:25:15+0800 [tpo] DEBUG: Filtered offsite request to 'toefl.100.c': <GET http://toefl.100.com/t/kouyu/380.html>2014-09-28 16:25:15+0800 [tpo] INFO: Closing spider (finished)2014-09-28 16:25:15+0800 [tpo] INFO: Dumping Scrapy stats:        {'downloader/request_bytes': 226,         'downloader/request_count': 1,         'downloader/request_method_count/GET': 1,         'downloader/response_bytes': 10365,         'downloader/response_count': 1,         'downloader/response_status_count/200': 1,         'finish_reason': 'finished',         'finish_time': datetime.datetime(2014, 9, 28, 8, 25, 15, 163000),         'log_count/DEBUG': 4,         'log_count/INFO': 7,         'offsite/domains': 1,         'offsite/filtered': 202,         'request_depth_max': 1,         'response_received_count': 1,         'scheduler/dequeued': 1,         'scheduler/dequeued/memory': 1,         'scheduler/enqueued': 1,         'scheduler/enqueued/memory': 1,         'start_time': datetime.datetime(2014, 9, 28, 8, 25, 14, 764000)}2014-09-28 16:25:15+0800 [tpo] INFO: Spider closed (finished)

编橙之家文章，