Scrapy：从squawka获取数据

Question

我正在尝试从Squawka网页上抓取埃弗顿和阿斯顿维拉比赛中射门的x和y坐标，网址是：http://epl.squawka.com/everton-vs-aston-villa/18-10-2014/english-barclays-premier-league/matches。

我使用了Firebug的元素检查器来获取圆圈的X路径（例如：/html/body/div[2]/div[3]/div[2]/div[1]/div/div[15]/div[2]/div[3]/div[1]/div[3]/div[1]/div[2]/svg/g[22]/circle）。每个射门圆圈的像素坐标都包含在cx和cy属性中。

我尝试使用Python中的scrapy模块来抓取这些数字，但没有成功。我对这个领域非常陌生，基本上是根据scrapy教程调整的代码。项目文件如下：

import scrapy

class SquawkaItem(scrapy.Item):
    cx = scrapy.Field()
    cy = scrapy.Field()

爬虫文件如下：

import scrapy
from squawka.items import SquawkaItem

class SquawkaSpider(scrapy.Spider):
    name = "squawka"
    allowed_domains = ["squawka.com"]
    start_urls = ["http://epl.squawka.com/everton-vs-aston-villa/18-10-2014/english-barclays-premier-league/matches"]

    def parse(self, response):
        for sel in response.xpath('/html/body/div/div/div/div/div/div/div/div/div/div/div/div/svg/g/circle'):
            cx = sel.xpath('[@cx]').extract()
            cy = sel.xpath('[@cy]').extract()
            print cx, cy

当我在Linux终端中运行这个爬虫，使用'scrapy crawl squawka'命令时，得到的输出是：

2014-10-26 12:49:53+0000 [scrapy] INFO: Scrapy 0.25.0-222-g675fd5b started (bot: squawka)
2014-10-26 12:49:53+0000 [scrapy] INFO: Optional features available: ssl, http11, boto, django
2014-10-26 12:49:53+0000 [scrapy] INFO: Overridden settings: {'NEWSPIDER_MODULE': 'squawka.spiders', 'SPIDER_MODULES': ['squawka.spiders'], 'BOT_NAME': 'squawka'}
2014-10-26 12:49:54+0000 [scrapy] INFO: Enabled extensions: LogStats, TelnetConsole, CloseSpider, CoreStats, SpiderState
2014-10-26 12:49:55+0000 [scrapy] INFO: Enabled downloader middlewares: HttpAuthMiddleware, DownloadTimeoutMiddleware, UserAgentMiddleware, RetryMiddleware, DefaultHeadersMiddleware, MetaRefreshMiddleware, HttpCompressionMiddleware, RedirectMiddleware, CookiesMiddleware, ChunkedTransferMiddleware, DownloaderStats
2014-10-26 12:49:55+0000 [scrapy] INFO: Enabled spider middlewares: HttpErrorMiddleware, OffsiteMiddleware, RefererMiddleware, UrlLengthMiddleware, DepthMiddleware
2014-10-26 12:49:55+0000 [scrapy] INFO: Enabled item pipelines: 
2014-10-26 12:49:55+0000 [squawka] INFO: Spider opened
2014-10-26 12:49:55+0000 [squawka] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2014-10-26 12:49:55+0000 [scrapy] DEBUG: Telnet console listening on 127.0.0.1:6023
2014-10-26 12:49:56+0000 [squawka] DEBUG: Crawled (200) <GET http://epl.squawka.com/everton-vs-aston-villa/18-10-2014/english-barclays-premier-league/matches> (referer: None)
2014-10-26 12:49:56+0000 [squawka] INFO: Closing spider (finished)
2014-10-26 12:49:56+0000 [squawka] INFO: Dumping Scrapy stats:
{'downloader/request_bytes': 300,
'downloader/request_count': 1,
'downloader/request_method_count/GET': 1,
'downloader/response_bytes': 16169,
'downloader/response_count': 1,
'downloader/response_status_count/200': 1,
'finish_reason': 'finished',
'finish_time': datetime.datetime(2014, 10, 26, 12, 49, 56, 402920),
'log_count/DEBUG': 1,
'log_count/INFO': 3,
'response_received_count': 1,
'scheduler/dequeued': 1,
'scheduler/dequeued/memory': 1,
'scheduler/enqueued': 1,
'scheduler/enqueued/memory': 1,
'start_time': datetime.datetime(2014, 10, 26, 12, 49, 55, 261954)}
2014-10-26 12:49:56+0000 [squawka] INFO: Spider closed (finished)

如你所见，它显示没有抓取到任何网页，也没有输出数据。我不知道该如何修改我的代码来获取我想要的数据。如果你有任何关于代码修改或其他技术的建议，我将非常感激。谢谢。

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Scrapy：从squawka获取数据

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