直接贴代码：

!/usr/bin/env python3

-- coding: utf-8 --

from scrapy.crawler import CrawlerProcess
from scrapy.utils.project import get_project_settings

process = CrawlerProcess(get_project_settings())
process.crawl('A_spider')
process.crawl('B_spider')
process.crawl('C_spider')

process.start()

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