title: Change proxy after x many loops
body: <p>I have a list of let's say 100 URLS.
  I want to change IP after every 10 URLS.</p>
  
  <p>Let's say I have my own proxies that I'd like to use after each 10 URLS.
  How would I use that proxy in my requests - ?</p>
  
  <pre><code>list = [100URLS items]
  proxies ['ip:port','ip:port']
  for urls in list:
     try:
         ##request 10 URLS here then it might throw me error. 
     except:
         #After it throws me error, I want to be able to use proxies inside a list something like this and reiterate the same request with a new proxy using requests. 
  </code></pre>