爬虫启动后，bash显示如下信息：
2020-04-07 18:38:17 [scrapy.core.engine] INFO: Spider opened
2020-04-07 18:38:17 [scrapy.extensions.logstats] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2020-04-07 18:38:17 [scrapy.extensions.telnet] INFO: Telnet console listening on 127.0.
