title: scrapy: 'module' object has no attribute 'OP_SINGLE_ECDH_USE'
body: <p>I am new in scrapy, I create a sample project in scrapy and run the project. I got an error  </p>
  
  <pre><code>AttributeError: 'module' object has no attribute 'OP_SINGLE_ECDH_USE'
  </code></pre>
  
  <p>Code:</p>
  
  <pre><code>import scrapy
  class DmozSpider(scrapy.Spider):
      name = "dmoz"
      allowed_domains = ["dmoz.org"]
      start_urls = ["https://www.grocerygateway.com"]
  
      def parse(self, response):
          filename = response.url.split("/")[-2]
          with open(filename, 'wb') as f:
              f.write(response.body)
  </code></pre>
  
  <p>Thanks in advance</p>