AttributeError: 'NoneType' object has no attribute 'lpush'

import scrapy
from redis import Redis
from selenium import webdriver
from scrapy.linkextractors import LinkExtractor
from scrapy.spiders import CrawlSpider, Rule
from fbsPro.items import FbsproItem


class FbsSpider(CrawlSpider):
    name = 'fbs'
    #allowed_domains = ['www.xxx.com']
    start_urls = ['https://www.fanqiehd.com/list/?5.html']
    conn=Redis(host='127.0.0.1',port=6379)

    rules = (
        Rule(LinkExtractor(allow=r'\?5-\d+.html'), callback='parse_item', follow=True),
    )
    modu_list=[]
    def parse_item(self, response):
        li_list=response.xpath('/html/body/div[3]/div/div[2]/div/div/ul/li')
        for li in li_list:
            li_href='https://www.fanqiehd.com'+li.xpath('./div[1]/a/@href').extract_first()
            self.modu_list.append(li_href)
            ex=self.conn.sadd('urls',li_href)
            if ex ==1:
                print('该数据没有爬取过，可进行爬取')
                yield scrapy.Request(url=li_href,callback=self.parse_item1)
            else:
                print('该数据已经爬取')
            yield scrapy.Request(url=li_href, callback=self.parse_item1)
    def parse_item1(self,response):
        name=response.xpath('/html/body/div[2]/div[1]/div/div[2]/h1/text()').extract_first()
        title=response.xpath('/html/body/div[2]/div[1]/div/div[2]/p[4]/a/text()').extract_first()
        print(name,title)
        item = FbsproItem()
        item['name'] = name
        item['title']=title
        yield item


pipelines中：
class FbsproPipeline:
    conn=None
    def openspider(self,spider):
        self.conn=spider.conn
    def process_item(self, item, spider):
        dic={
            'name':item['name'],
            'title':item['title']
        }
        self.conn.lpush('moviedata',dic)

        return item

代码运行后出现标题中的问题，是啥原因呢？