Python3 scrapy框架版本区别(避坑)

1.7

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

dispatcher.connect(self.spider_closed,signals.spider_closed)   #爬虫关闭时调用程序

2.4.1

from pydispatch import dispatcher
from scrapy import signals

dispatcher.connect(self.spider_closed,signals.spider_closed)   #爬虫关闭时调用程序