Python 用scrapy搜索网站上的所有评论

我试图用Scrapy抓取购物网站上的所有评论。我发现这个代码：

import scrapy
from scrapy.spiders import CrawlSpider, Rule
from scrapy.linkextractors import LinkExtractor

class deneme(CrawlSpider):
name = 'deneme'
allowed_domains = ['hepsiburada.com']
start_urls = ['https://www.hepsiburada.com/']

rules = (
    Rule(LinkExtractor(), callback='parse_item', follow=True),
)

def parse_item(self, response):
    filename = response.url.split("/")[-2] + '.html'
    with open(filename, 'wb') as f:
        f.write(response.body)

此代码爬网整个网站。但我只想抓取网站上的评论，并将其写入MongoDB数据库。我不擅长Python。我该怎么做？谢谢大家!

以下是代码：

import scrapy
from scrapy.spiders import CrawlSpider, Rule
from scrapy.linkextractors import LinkExtractor

class deneme(CrawlSpider):
    name = 'yorum'
    allowed_domains = ['hepsiburada.com']
    start_urls = ['https://www.hepsiburada.com/']
    rules = (
        Rule(LinkExtractor(), callback='parse_item', follow=True),
    )


    def parse_item(self, response):




        print(response.xpath('//p[@class="review-text"]/text()').extract())

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你在回答自己的问题吗？