title: Retrieve info from link on page being scraped
body: <p>I am building a scraper using scrapy on python 3.5.</p>
  
  <p>I am scraping projects in a crowd funding forum and saving the data in a hdf5 file.</p>
  
  <p>Scraping the projects is done by reading in a list of urls, which is scraped and the information of each project is then saved as a tabel row (with multiple columns). This is the top of my script:   </p>
  
  <pre><code>class ExperimentScraperSpider(scrapy.Spider):
      name = 'project_scraper'
      allowed_domains = ['projectname.com']
  
      dt = pd.read_csv("urls.csv") #list of urls
      start_urls = dt["url"].tolist()
  
      def parse(self, response):
  
          title = response.css('h1.title::text').extract_first() #name of project
          tags = response.css('a.tag.category::text').extract() #project tags
  
          ...
  </code></pre>
  
  <p>Unfortunately some of the project information is placed in an sub-link (e.g. .../methods). I would like to get the information from this link into the same row of the hdf5-file as the other information from the project. How can this be done?</p>
  
  <p>Could I build a parser inside the parser I am already using?</p>