code: def is_cloudflare_challenge(response):
          
  
          return (
              response.status == 503
              and response.headers.get('Server', '').startswith(b'cloudflare')
              and 'jschl_vc' in response.text
              and 'jschl_answer' in response.text
          )
docs: Test if the given response contains the cloudflare's anti-bot protection