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python - 网站被抓取但未被抓取 Scrapy

问题描述

我一直在抓取这个网站并尝试存储属性，虽然有些属性确实被抓取，但有些只是被抓取而不是被抓取：

class CapeWaterfrontSpider(scrapy.Spider):
    name = "cape_waterfront"
    start_urls = ['https://www.capewaterfrontestates.co.za/template/Properties.vm/listingtype/SALES']

    def parse(self, response):
        for prop in response.css('div.col-sm-6.col-md-12.grid-sizer.grid-item'):

            link = prop.css('div.property-image a::attr(href)').get()

            bedrooms = prop.css('div.property-details li.bedrooms::text').getall()
            bathrooms = prop.css('div.property-details li.bathrooms::text').getall()
            gar = prop.css('div.property-details li.garages::text').getall()

            if len(bedrooms) == 0:
                bedrooms.append(None)
            else:
                bedrooms = bedrooms[1].split()
            if len(bathrooms) == 0:
                bathrooms.append(None)
            else:
                bathrooms = bathrooms[1].split()
            if len(gar) == 0:
                gar.append(None)
            else:
                gar = gar[1].split()

            yield scrapy.Request(
                link,
                meta={'item': {
                    'agency': self.name,
                    'url': link,
                    'title': ' '.join(prop.css('div.property-details p.intro::text').get().split()),
                    'price': ''.join(prop.css('div.property-details p.price::text').get().split()),
                    'bedrooms': str(bedrooms),
                    'bathroom':  str(bathrooms),
                    'garages': str(gar)
                }},
                callback=self.get_loc,
            )

        next_page = response.css('p.form-control-static.pagination-link a::attr(href)').get()
        if next_page is not None:
            next_page = response.urljoin(next_page)
            yield scrapy.Request(next_page, callback=self.parse)

任何建议如何使这项工作？非常感谢您提前

标签： pythonweb-scrapingscrapy

解决方案

您定义选择器的方式很容易出错。此外，很少有故障的选择器根本不工作。下一页的链接也不起作用。它只进入第 1 页，然后退出。最后，我不知道next_siblingin css 选择器的任何用法，所以我不得不以某种尴尬的方式挖掘出下一个兄弟姐妹的东西。

class CapeWaterfrontSpider(scrapy.Spider):
    name = "cape_waterfront"
    start_urls = ['https://www.capewaterfrontestates.co.za/template/Properties.vm/listingtype/SALES']

    def parse(self, response):

        for prop in response.css('.grid-item'):
            link = prop.css('.property-image a::attr(href)').get()

            bedrooms = [elem.strip() for elem in prop.css(".bedrooms::text").getall()]
            bedrooms = bedrooms[-2] if len(bedrooms)>=1 else None

            bathrooms = [elem.strip() for elem in prop.css(".bathrooms::text").getall()]
            bathrooms = bathrooms[-2] if len(bathrooms)>=1 else None

            gar = [elem.strip() for elem in prop.css(".garages::text").getall()]
            gar = gar[-2] if len(gar)>=1 else None

            yield scrapy.Request(
                link,
                meta={'item': {
                    'agency': self.name,
                    'url': link,
                    'bedrooms': bedrooms,
                    'bathroom':  bathrooms,
                    'garages': gar
                }},
                callback=self.get_loc,
            )

        next_page = response.css('.pagination-link a.next::attr(href)').get()
        if next_page:
            next_page = response.urljoin(next_page)
            yield scrapy.Request(next_page, callback=self.parse)

    def get_loc(self,response):
        items = response.meta['item']
        print(items)

如果您想采用更清洁的方法来获取这三个项目，我认为xpath这就是您要坚持的：

for prop in response.css('.grid-item'):
    link = prop.css('.property-image a::attr(href)').get()
    bedrooms = prop.xpath("normalize-space(.//*[contains(@class,'bedrooms')]/label/following::text())").get()
    bathrooms = prop.xpath("normalize-space(.//*[contains(@class,'bathrooms')]/label/following::text())").get()
    gar = prop.xpath("normalize-space(.//*[contains(@class,'garages')]/label/following::text())").get()

为简洁起见，我排除了两三个字段，我想您可以管理它们。

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