9.Scrapy之自定义命令（全部爬虫执行）

1.在spiders同级创建任意目录，如：commands

2.在其中创建 crawlall.py 文件 （此处文件名就是自定义的命令）

3.编写代码

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()

4.setting.py配置：COMMANDS_MODULE = ‘项目名称.commands’

5.命令行执行：scrapy crawlall