如果其他条件无法应用（过滤）[重复]

Question

我使用scrapy进行网页抓取，我可以抓取所有元素，但我的目标是获取所有评论大于 50 的名称，我不知道我缺少哪里

import scrapy


class TripadSpider(scrapy.Spider):
    name = 'tripad'
    allowed_domains = ['www.tripadvisor.in']
    start_urls = ['https://www.tripadvisor.in/Restaurants-g304554-c33-Mumbai_Maharashtra.html']
    first = 'https://www.tripadvisor.in/'

    def parse(self, response):
        for i in response.xpath("//div[@class='_2Q7zqOgW Vt o']"):
            rating = str(i.xpath(".//span[@class='w726Ki5B']/text()").get())

            if rating >= '50':
                title = i.xpath(".//a[@class='_15_ydu6b S5 H4 Cj b']/text()").getall()
                yield {
                    'title':title,
                    'rating':rating
                }
            elif rating == 'None':
                continue

        next_page = response.xpath("//a[@class='nav next rndBtn ui_button primary taLnk']/@href").get()
        if next_page:
            sequence = (self.first,next_page)
            nexturl = ''.join(sequence)
            yield scrapy.Request(url=nexturl,callback=self.parse)

谁能帮帮我

Answer 1

用小数替换逗号

if type(eval(rating)) == int or type(eval(rating)) == float:
    rating_string_decimal = rating.replace(',','.')
    val = float(rating_string_decimal )
    if round(rating_string_decimal)>= 50:
          title = i.xpath(".//a[@class='_15_ydu6b S5 H4 Cj b']/text()").getall()
                yield {
                    'title':title,
                    'rating':rating
                }
elif rating == 'None':
    continue