你为什么不直接说：

scrapy list|xargs -n 1 scrapy crawl

？

下面是一个不在自定义命令中运行的示例，但它手动运行Reactor并为每个蜘蛛创建一个新的Crawler：

from twisted.internet import reactor
from scrapy.crawler import Crawler
# scrapy.conf.settings singlton was deprecated last year
from scrapy.utils.project import get_project_settings
from scrapy import log

def setup_crawler(spider_name):
    crawler = Crawler(settings)
    crawler.configure()
    spider = crawler.spiders.create(spider_name)
    crawler.crawl(spider)
    crawler.start()

log.start()
settings = get_project_settings()
crawler = Crawler(settings)
crawler.configure()

for spider_name in crawler.spiders.list():
    setup_crawler(spider_name)

reactor.run()

您必须设计some signal system以在所有spider完成时停止reactor。
编辑：下面是如何在一个自定义命令中运行多个spider：

from scrapy.command import ScrapyCommand
from scrapy.utils.project import get_project_settings
from scrapy.crawler import Crawler

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):
        settings = get_project_settings()

        for spider_name in self.crawler.spiders.list():
            crawler = Crawler(settings)
            crawler.configure()
            spider = crawler.spiders.create(spider_name)
            crawler.crawl(spider)
            crawler.start()

        self.crawler.start()

@Steven Almeroth的答案在Scrapy 1.0中会失败，您应该像这样编辑脚本：

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

class Command(ScrapyCommand):

    requires_project = True
    excludes = ['spider1']

    def syntax(self):
        return '[options]'

    def short_desc(self):
        return 'Runs all of the spiders'

    def run(self, args, opts):
        settings = get_project_settings()
        crawler_process = CrawlerProcess(settings) 

        for spider_name in crawler_process.spider_loader.list():
            if spider_name in self.excludes:
                continue
            spider_cls = crawler_process.spider_loader.load(spider_name) 
            crawler_process.crawl(spider_cls)
        crawler_process.start()

此代码适用于我的scrapy版本是1. 3. 3（保存在scrapy. cfg中的同一目录下）：

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

setting = get_project_settings()
process = CrawlerProcess(setting)

for spider_name in process.spiders.list():
    print ("Running spider %s" % (spider_name))
    process.crawl(spider_name,query="dvh") #query dvh is custom argument used in your scrapy

process.start()

对于scrapy 1.5.x（这样你就不会收到弃用警告）

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

setting = get_project_settings()
process = CrawlerProcess(setting)

for spider_name in process.spider_loader.list():
    print ("Running spider %s" % (spider_name))
    process.crawl(spider_name,query="dvh") #query dvh is custom argument used in your scrapy

process.start()

Linux脚本

#!/bin/bash
for spider in $(scrapy list)
do
scrapy crawl "$spider" -o "$spider".json
done

使用python运行项目中的所有蜘蛛

# Run all spiders in project implemented using Scrapy 2.7.0

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

def main():
    settings = get_project_settings()
    process = CrawlerProcess(settings)
    spiders_names = process.spider_loader.list()
    for s in spiders_names:
        process.crawl(s)
    process.start()

if __name__ == '__main__':
    main()