def run(self, args, opts):
    if len(args) < 1:
      raise UsageError()
    elif len(args) > 1:
      raise UsageError("running 'scrapy crawl' with more than one spider is no longer supported")
    spname = args[0]

    self.crawler_process.crawl(spname, **opts.spargs)
    self.crawler_process.start()

#修改后的run() 方法
  def run(self, args, opts):
    #获取爬虫列表
    spd_loader_list = self.crawler_process.spider_loader.list()
    #遍历各爬虫
    for spname in spd_loader_list or args:
      self.crawler_process.crawl(spname, **opts.spargs)
      print("此时启动的爬虫："+spname)
    self.crawler_process.start()

 def short_desc(self):
    return "Run all spider"

scrapy mycrawl --nolog