爬虫不产生任何输出

Question

构建我的第一个网络爬虫。我只是想获取名称列表并将它们附加到 csv 文件中。刮板似乎可以工作，但不如预期。输出文件只产生一个名字，这个名字总是被刮掉的姓氏。当我重新运行刮板时，它总是一个不同的名字。在这种情况下，写入 csv 文件的名称是 Ola Aina。

#Create the spider class
class premSpider(scrapy.Spider):
    name = "premSpider"
    
    def start_requests(self):
        
        # Create a List of Urls with which we wish to scrape
        urls = ['https://www.premierleague.com/players']
        
        #Iterate through each url and send it to be parsed
        
        for url in urls:
            
            #yield kind of acts like return
            yield scrapy.Request(url = url, callback = self.parse)
            
    def parse(self, response):
        
        #extract links to player pages
        plinks = response.xpath('//tr').css('a::attr(href)').extract()
        
        #follow links to specific player pages
        for plink in plinks:
            
            yield response.follow(url = plink, callback = self.parse2)
            
    def parse2(self, response):
        
        plinks2 = response.xpath('//a[@href="stats"]').css('a::attr(href)').extract()
        
        for link2 in plinks2:
            
            yield response.follow(url = link2, callback = self.parse3)
        
    def parse3(self, response):
        
        names= response.xpath('//div[@class="name t-colour"]/text()').extract()
        
        filepath = 'playerlinks.csv'
        
        with open(filepath, 'w') as f:
            f.writelines([name + '\n' for name in names])

process = CrawlerProcess()

process.crawl(premSpider)

process.start()      

Answer 1

你也可以使用 Scrapy 自己的“FEEDS”导出..

在您的蜘蛛名称下方添加：

custom_settings = {'FEEDS':{'results1.csv':{'format':'csv'}}}"

并将parse3修改为如下：

    def parse3(self, response):   
        names=response.xpath('.//div[@class="name t-colour"]/text()').get()
        yield {'names':names}