python 爬冲CSS选择器报错!新人求助

import requests,parsel
def main():
        start_url='https://sjz.lianjia.com/ershoufang/pg1/'
        headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 ''(KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36'}
        response=requests.get(start_url,headers=headers).content.decode()
        selector=parsel.Selector(response)
        lis=selector.css('.sellListContent li')
        dit={}
        for li in lis:
            title=li.css('.title a::text').get()
            dit['标题']=title
            positioninfo=li.css('.positionInfo a::text').getall()
            info = '-'.join(positionInfo)
            dit['开发商']=positioninfo
            houseinfo=li.css('.houseInfo::text').get()
            dit['房子信息']=houseinfo
            followinfo=li.css('.followinfo::text').get()
            dit['发布周期']=followinfo
            price=li.css('.totalPrice span::text').get()
            dit['售价/万']=price
            unitprice=li.css('u.unitPrice span::text').get()
            dic['单价']=unitprice
        print(dit)
main()

这段代码报错:

       Traceback (most recent call last):
  File "C:\Users\zhaorl\Desktop\python\0609bs4.py", line 24, in <module>
    main()
  File "C:\Users\zhaorl\Desktop\python\0609bs4.py", line 10, in main
    title=li.css('.title a::text').get()
AttributeError: 'SelectorList' object has no attribute 'get'

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