title: why this show me 'DNS lookup failed'?
body: <p>scrapers.here is my code. I am using scrapy basic spider template and I am getting DNS lookup failed error. where is my mistake?</p>
  
  <pre><code>class TopmoviesSpider(scrapy.Spider):
      name = 'topmovies'
      allowed_domains = ['www.imdb.com']
      start_urls = ['https://https://www.imdb.com/chart/top/']
  
  
  
       def parse(self, response):
              movies = response.xpath("//td[@class='titleColumn']/a")
              for movie in movies:
                  link = movie.xpath(".//@href").get()
                  yield response.follow(url=link, callback=self.scrape_movie)
  
  
          def scrape_movie(self,response):
  
              rating = response.xpath("//span[@itemprop='ratingValue']/text()").get()
              for mov in response.xpath("//div[@class='title_wrapper']"):
                  yield {
                      'title': mov.xpath(".//h1/text()").get(),
                      'year_of_release': mov.xpath(".//span/a/text()").get(),
                      'duration': mov.xpath(".//div[@class='subtext']/time/text()").get(),
                      'genre': mov.xpath(".//div[@class='subtext']/a/text()").get(),
                      'date_of_release': mov.xpath("//div[@class='subtext']/a[2]/text()"),
                      'rating': rating
                  }
  </code></pre>