title: AWS CLI file extension association warning on Windows
body: <p>Using aws cli with python 3 on Windows, always getting a warning, but the program runs well after this message.</p>
  <p>For example:</p>
  <pre><code>&gt;&gt;&gt; aws --version --debug
  Не найдено сопоставление для расширения имени файла .py.
  aws-cli/1.15.83 Python/3.6.0 Windows/7 botocore/1.10.82
  </code></pre>
  <p>(vaguely -' Cannot find association for filename extension .py')</p>
  <p>Any idea which part of aws scripts issues this warning and how to fix it? At what part does aws use Windows call?</p>