scrapy自定制命令

自定制命令

• 在spiders同级创建任意目录，如：commands
• 在其中创建 crawlall.py 文件 （此处文件名就是自定义的命令）

• from scrapy.commands import ScrapyCommand
      from scrapy.utils.project import get_project_settings
  
  
      class Command(ScrapyCommand):
  
          requires_project = True
  
          def syntax(self):
              return '[options]'
  
          def short_desc(self):
              return 'Runs all of the spiders'
  
          def run(self, args, opts):
              spider_list = self.crawler_process.spiders.list()
              for name in spider_list:
                  self.crawler_process.crawl(name, **opts.__dict__)
              self.crawler_process.start()

• 在settings.py 中添加配置 COMMANDS_MODULE = '项目名称.目录名称'
• 在项目目录执行命令：scrapy crawlall

 单个爬虫：

import sys
from scrapy.cmdline import execute

if __name__ == '__main__':
    execute(["scrapy","crawl","chouti","--nolog"])