title: requests, cannot assign requested address, out of ports?
body: <pre><code>requests.exceptions.ConnectionError: ('Connection aborted.', error(99, 'Cannot assign requested address'))
  </code></pre>
  
  <p>I was getting this error when running multiple processes utilizing the python requests library and calling the <code>post</code> function to an API that was returning very quickly (&lt;10ms). </p>
  
  <p>Dialing down the number of processes running had a delaying effect, but only dialing down to 1 process eliminated the problem. This was not a solution, but did indicate a finite resource was the culprit.</p>