我可以使用CrawlerRunner或CrawlerProcess从另一个Python脚本调用一个抓爬虫。但是，当我尝试从pywikibot机器人调用同一蜘蛛调用类时，出现ReactorNotRestartable错误。为什么会这样，我该如何解决？

这是错误：

  File ".\scripts\userscripts\ReplicationWiki\RWLoad.py",line 161,in format_new_page
    aea = AEAMetadata(url=DOI_url)
  File ".\scripts\userscripts\ReplicationWiki\GetaEAMetadata.py",line 39,in __init__
    reactor.run() # the script will block here until all crawling jobs are finished
  File "C:\Users\lextr\.conda\envs\py37\lib\site-packages\twisted\internet\base.py",line 1282,in run
    self.startRunning(installSignalHandlers=installSignalHandlers)
  File "C:\Users\lextr\.conda\envs\py37\lib\site-packages\twisted\internet\base.py",line 1262,in startRunning
    ReactorBase.startRunning(self)
  File "C:\Users\lextr\.conda\envs\py37\lib\site-packages\twisted\internet\base.py",line 765,in startRunning
    raise error.ReactorNotRestartable()
twisted.internet.error.ReactorNotRestartable
CRITICAL: Exiting due to uncaught exception <class 'twisted.internet.error.ReactorNotRestartable'>

这是一个叫我沙皮蜘蛛的脚本。如果我只是从main调用类，它将运行正常。

from twisted.internet import reactor,defer
from scrapy import signals
from scrapy.crawler import Crawler,CrawlerProcess,CrawlerRunner
from scrapy.settings import Settings
from scrapy.utils.project import get_project_settings

from Scrapers.spiders.ScrapeAEA import ScrapeaeaSpider

class AEAMetadata:
    """
    Helper to run ScrapeAEA spider and return JEL codes and data links
    for a given AEA article link.
    """

    def __init__(self,*args,**kwargs):
        """Initializer"""

        url = kwargs.get('url')
        if not url:
            raise ValueError('No article url given')

        self.items = []
        def collect_items(item,response,spider):
            self.items.append(item)

        settings = get_project_settings()
        crawler = Crawler(ScrapeaeaSpider,settings)
        crawler.signals.connect(collect_items,signals.item_scraped)

        runner = CrawlerRunner(settings)
        d = runner.crawl(crawler,url=url)
        d.addBoth(lambda _: reactor.stop())
        reactor.run() # the script will block here until all crawling jobs are finished

         #process = CrawlerProcess(settings)
         #process.crawl(crawler,url=url)
         #process.start()  # the script will block here until the crawling is finished

    def get_jelcodes(self):
        jelcodes = self.items[0]['jelcodes']
        return jelcodes

def main():
    aea = AEAMetadata(url='https://doi.org/10.1257/app.20180286')
    jelcodes = aea.get_jelcodes()
    print(jelcodes)

if __name__ == '__main__':
    main()

更新了简单的Test，该实例两次实例化AEAMetadata类。 这是我的pywikibot机器人中失败的调用代码：

from GetaEAMetadata import AEAMetadata

def main(*args):
    for _ in [1,2]:
        print('Top')
        url = 'https://doi.org/10.1257/app.20170442'
        aea = AEAMetadata(url=url)
        print('After AEAMetadata')
        jelcodes = aea.get_jelcodes()
        print(jelcodes)


if __name__ == '__main__':
    main()