scrapy之定制命令

单爬虫运行

import sys
from scrapy.cmdline import execute

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

然后右键运行py文件即可运行名为‘chouti‘的爬虫

同时运行多个爬虫

步骤如下：

- 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）
- 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 

代码如下：

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()

crawlall.py