Question

我正在试图抓住一家知名英国零售商的网站，但我遇到了我的CrawlSpider问题 - 我收到以下错误消息：

AttributeError：'NlCrawlerSpider'对象没有属性'_rules'

我使用示例here将我的常规蜘蛛转换为爬行蜘蛛;我也使用了建议here的规则的语法，但最终得到了相同的错误消息。非常感谢您的所有帮助 - 提前谢谢您！

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

# Other Packages
import time
from datetime import date
from selenium import webdriver


class NlCrawlerSpider(CrawlSpider):
    name = 'nl_crawler'
    allowed_domains = ['newlook.com']
    start_urls = ['http://www.newlook.com/uk/womens/clothing/c/uk-womens-clothing?comp=NavigationBar%7Cmn%7Cwomens%7Cclothing#/?q=:relevance&page=1&sort=relevance&content=false']

rules = (
    Rule(LinkExtractor(allow=r'\?q=:relevance&page=[1-130]&sort=relevance&content=false', ), callback='parse_item', follow=True),
)

def __init__(self):
    self.driver = webdriver.Safari()
    self.driver.set_window_size(800,600)
    time.sleep(2)

def parse_item(self, response):
    driver = self.driver
    driver.get(response.url)
    time.sleep(2)


    # Collect products
    products = driver.find_elements_by_class_name('plp-item ng-scope')

    # Iterate over products; extract data and append individual features to NlScrapeItem
    for item in products:

        # Pull features
        desc = item.find_element_by_class_name('product-item__name link--nounderline ng-binding').text
        href = item.find_element_by_class_name('plp-carousel__img-link ng-scope').get_attribute('href')

        # Generate a product identifier
        identifier = href.split('/p/')[1].split('?comp')[0]
        identifier = int(identifier)

        # datetime
        dt = date.today()
        dt = dt.isoformat()

        # Price Symbol removal and integer conversion
        try:
            priceString = item.find_element_by_class_name('price ng-binding').text
        except:
            priceString = item.find_element_by_class_name('price price--previous-price product-item__price--previous-price ng-binding ng-scope').text
        priceInt = priceString.split('£')[1]
        originalPrice = float(priceInt)

        # discountedPrice Logic
        try:
            discountedPriceString = item.find_element_by_class_name('price ng-binding price--marked-down').text
            discountedPriceInt = discountedPriceString.split('£')[1]
            discountedPrice = float(discountedPriceInt)
        except:
            discountedPrice = 'N/A'

        # NlScrapeItem
        item = NlScrapeItem()

        # Append product to NlScrapeItem
        item['identifier'] = identifier
        item['href'] = href
        item['description'] = desc
        item['originalPrice'] = originalPrice
        item['discountedPrice'] = discountedPrice
        item['firstSighted'] = dt
        item['lastSighted'] = dt

        yield item

加法：所以我试图忽略使用crawlSpider的想法并遵循@jabargas思考 - 见下文：

def __init__(self):
    self.driver = webdriver.Safari()
    self.driver.set_window_size(800,600)

def start_requests(self):
    n = 5
    urls= []
    for pageNumber in range(1,n):
            url = 'http://www.newlook.com/uk/womens/clothing/c/uk-womens-clothing?comp=NavigationBar%%7Cmn%%7Cwomens%%7Cclothing#/?q=:relevance&page=%d&sort=relevance&content=false' % pageNumber
            urls.append(url)

    for url in urls:
        yield scrapy.Request(url=url, callback=self.parse)


def parse(self, response):
    driver = self.driver
    driver.get(response.url)
    time.sleep(2)


    # Collect products
    products = driver.find_elements_by_class_name('plp-item ng-scope')

    # Iterate over products; extract data and append individual features to NlScrapeItem
    for item in products:

        # Pull features
        desc = item.find_element_by_class_name('product-item__name link--nounderline ng-binding').text
        href = item.find_element_by_class_name('plp-carousel__img-link ng-scope').get_attribute('href')

        # Generate a product identifier
        identifier = href.split('/p/')[1].split('?comp')[0]
        identifier = int(identifier)

        # datetime
        dt = date.today()
        dt = dt.isoformat()

        # Price Symbol removal and integer conversion
        try:
            priceString = item.find_element_by_class_name('price ng-binding').text
        except:
            priceString = item.find_element_by_class_name('price price--previous-price product-item__price--previous-price ng-binding ng-scope').text
        priceInt = priceString.split('£')[1]
        originalPrice = float(priceInt)

        # discountedPrice Logic
        try:
            discountedPriceString = item.find_element_by_class_name('price ng-binding price--marked-down').text
            discountedPriceInt = discountedPriceString.split('£')[1]
            discountedPrice = float(discountedPriceInt)
        except:
            discountedPrice = 'N/A'

        # NlScrapeItem
        item = NlScrapeItem()

        # Append product to NlScrapeItem
        item['identifier'] = identifier
        item['href'] = href
        item['description'] = desc
        item['originalPrice'] = originalPrice
        item['discountedPrice'] = discountedPrice
        item['firstSighted'] = dt
        item['lastSighted'] = dt

        yield item

不幸的是没有运气：它提取了48项细节。

Answer 1

你可以这样做，直到第n页：

start_urls = ['http://www.newlook.com/uk/womens/clothing/c/uk-womens-clothing?comp=NavigationBar%%7Cmn%%7Cwomens%%7Cclothing#/?q=:relevance&page=%d&sort=relevance&content=false' % page_number' for page_number in range(1,n)]

其中n是最后一页+ 1

或者你可以使用scrapy分页 - 获取下一页的链接并按照它查找here。

Answer 2

另一个可能的问题是，您没有在 init 方法中添加超级构造函数。

为此添加“ super（MySpider，self）。初始化（* a，** kw）”。

我遇到了同样的问题，并由此解决了问题。

因此 init 应该如下所示

def __init__(self, *a, **kw):
    super(MySpider, self).__init__(*a, **kw)
    //your initializations

Scrape CrawlSpider AttributeError'_rules'

2 个答案: