scrapy: Call a function when a spider quits

It looks like you can register a signal listener through dispatcher.

I would try something like:

from scrapy import signals
from scrapy.xlib.pydispatch import dispatcher

class MySpider(CrawlSpider):
    def __init__(self):
        dispatcher.connect(self.spider_closed, signals.spider_closed)

    def spider_closed(self, spider):
      # second param is instance of spder about to be closed.

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In the newer version of scrapy scrapy.xlib.pydispatch is deprecated. instead you can use from pydispatch import dispatcher.