title: Pylint to show only warnings and errors
body: <p>I would like to use pylint to check my code but I am only interested in error and warning levels. Is there a way to do that in command line or in pylintrc?</p>
  
  <p>I am not interested in filtering given issues (like listing all messages in MESSAGE CONTROL), I just want pylint to ignore <strong>all</strong> convention and refactor messages.</p>
  
  <p>Note: I don't think that's a duplicate of <a href="https://stackoverflow.com/questions/20639173/using-pylint-to-display-error-and-warnings">Using Pylint to display error and warnings</a></p>