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）
• 

   1 from scrapy.commands import ScrapyCommand
   2     from scrapy.utils.project import get_project_settings
   3 
   4 
   5     class Command(ScrapyCommand):
   6 
   7         requires_project = True
   8 
   9         def syntax(self):
  10             return '[options]'
  11 
  12         def short_desc(self):
  13             return 'Runs all of the spiders'
  14 
  15         def run(self, args, opts):
  16             spider_list = self.crawler_process.spiders.list()
  17             for name in spider_list:
  18                 self.crawler_process.crawl(name, **opts.__dict__)
  19             self.crawler_process.start()

  crawlall.py

• 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"])