我有一个简单的蜘蛛抓取了一些搜索结果。输出有效，看起来不错，但是当我尝试导出时，最终得到的是空文件。我知道这个问题经常被问到，但是我似乎无法弄清楚。我希望任何人都能帮助我。
这是我的蜘蛛！
import scrapy
class QuotesSpider(scrapy.Spider):
name = 'gov2'
start_urls = ['https://beta.companieshouse.gov.uk/search?q=a']
def parse(self, response):
products = response.xpath('//*[@id="results"]').extract()
这是用于导出的代码！
scrapy crawl gov2 -o gov2.json
还尝试了CSV
scrapy crawl gov2 -o gov2.csv
这是导出时的输出
2019-03-14 10:46:59 [scrapy.utils.log] INFO: Scrapy 1.6.0 started (bot: gov2)
2019-03-14 10:46:59 [scrapy.utils.log] INFO: Versions: lxml 4.3.2.0, libxml2 2.9.9, cssselect 1.0.3, parsel 1.5.1, w3lib 1.20.0, Twisted 18.9.0, Python 2.7.16rc1 (default, Feb 18 2019, 11:05:09) - [GCC 8.2.0], pyOpenSSL 19.0.0 (OpenSSL 1.1.1b 26 Feb 2019), cryptography 2.6.1, Platform Linux-4.19.0-kali1-amd64-x86_64-with-Kali-kali-rolling-kali-rolling
2019-03-14 10:46:59 [scrapy.crawler] INFO: Overridden settings: {'NEWSPIDER_MODULE': 'gov2.spiders', 'FEED_URI': 'gov2.json', 'SPIDER_MODULES': ['gov2.spiders'], 'BOT_NAME': 'gov2', 'ROBOTSTXT_OBEY': True, 'FEED_FORMAT': 'json'}
2019-03-14 10:46:59 [scrapy.extensions.telnet] INFO: Telnet Password: a74692ba48906b88
2019-03-14 10:46:59 [scrapy.middleware] INFO: Enabled extensions:
['scrapy.extensions.feedexport.FeedExporter',
'scrapy.extensions.memusage.MemoryUsage',
'scrapy.extensions.logstats.LogStats',
'scrapy.extensions.telnet.TelnetConsole',
'scrapy.extensions.corestats.CoreStats']
2019-03-14 10:46:59 [scrapy.middleware] INFO: Enabled downloader middlewares:
['scrapy.downloadermiddlewares.robotstxt.RobotsTxtMiddleware',
'scrapy.downloadermiddlewares.httpauth.HttpAuthMiddleware',
'scrapy.downloadermiddlewares.downloadtimeout.DownloadTimeoutMiddleware',
'scrapy.downloadermiddlewares.defaultheaders.DefaultHeadersMiddleware',
'scrapy.downloadermiddlewares.useragent.UserAgentMiddleware',
'scrapy.downloadermiddlewares.retry.RetryMiddleware',
'scrapy.downloadermiddlewares.redirect.MetaRefreshMiddleware',
'scrapy.downloadermiddlewares.httpcompression.HttpCompressionMiddleware',
'scrapy.downloadermiddlewares.redirect.RedirectMiddleware',
'scrapy.downloadermiddlewares.cookies.CookiesMiddleware',
'scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware',
'scrapy.downloadermiddlewares.stats.DownloaderStats']
2019-03-14 10:46:59 [scrapy.middleware] INFO: Enabled spider middlewares:
['scrapy.spidermiddlewares.httperror.HttpErrorMiddleware',
'scrapy.spidermiddlewares.offsite.OffsiteMiddleware',
'scrapy.spidermiddlewares.referer.RefererMiddleware',
'scrapy.spidermiddlewares.urllength.UrlLengthMiddleware',
'scrapy.spidermiddlewares.depth.DepthMiddleware']
2019-03-14 10:46:59 [scrapy.middleware] INFO: Enabled item pipelines:
[]
2019-03-14 10:46:59 [scrapy.core.engine] INFO: Spider opened
2019-03-14 10:46:59 [scrapy.extensions.logstats] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2019-03-14 10:46:59 [scrapy.extensions.telnet] INFO: Telnet console listening on 127.0.0.1:6024
2019-03-14 10:47:00 [scrapy.core.engine] DEBUG: Crawled (404) <GET https://beta.companieshouse.gov.uk/robots.txt> (referer: None)
2019-03-14 10:47:02 [scrapy.core.engine] DEBUG: Crawled (200) <GET https://beta.companieshouse.gov.uk/search?q=a> (referer: None)
2019-03-14 10:47:02 [scrapy.core.engine] INFO: Closing spider (finished)
2019-03-14 10:47:02 [scrapy.statscollectors] INFO: Dumping Scrapy stats:
{'downloader/request_bytes': 541,
'downloader/request_count': 2,
'downloader/request_method_count/GET': 2,
'downloader/response_bytes': 57488,
'downloader/response_count': 2,
'downloader/response_status_count/200': 1,
'downloader/response_status_count/404': 1,
'finish_reason': 'finished',
'finish_time': datetime.datetime(2019, 3, 14, 14, 47, 2, 422730),
'log_count/DEBUG': 2,
'log_count/INFO': 9,
'memusage/max': 53796864,
'memusage/startup': 53796864,
'response_received_count': 2,
'robotstxt/request_count': 1,
'robotstxt/response_count': 1,
'robotstxt/response_status_count/404': 1,
'scheduler/dequeued': 1,
'scheduler/dequeued/memory': 1,
'scheduler/enqueued': 1,
'scheduler/enqueued/memory': 1,
'start_time': datetime.datetime(2019, 3, 14, 14, 46, 59, 955991)}
2019-03-14 10:47:02 [scrapy.core.engine] INFO: Spider closed (finished)
编辑：添加了导出代码行