scrapy爬虫解析起始页网页链接后request请求不能正常跳转到下一级爬虫类的解析方法中

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.