title: Python requests proxies.txt IP:Port:User:pass
body: <p>I am trying to use like a file where I store my proxies in it. I want to load these on a proxies on the requests module.</p>
  
  <p>But the problem now is, my proxies are mixed up. Some proxies are with authentication, and some doesn´t.</p>
  
  <p>So my proxies.txt looks like this</p>
  
  <pre><code>123.12.190.121:2323:user:pass
  123.12.190.122:2323:user:pass
  123.12.190.123:2323
  123.12.190.124:2323:user:pass
  123.12.190.125:2323
  </code></pre>
  
  <p>Some with authentication, some doesn´t.</p>
  
  <p>now I want to call a command like this</p>
  
  <pre><code>response = session.get(URL, proxies=proxies)
  </code></pre>
  
  <p>with the loaded proxies stored in my proxies.txt</p>
  
  <p>Can someone help me out?</p>