title: How to normalize a list of positive and negative decimal number to a specific range
body: <p>I have a list of decimal numbers as follows:</p>
  
  <pre><code>[-23.5, -12.7, -20.6, -11.3, -9.2, -4.5, 2, 8, 11, 15, 17, 21]
  </code></pre>
  
  <p>I need to normalize this list to fit into the range <code>[-5,5]</code>.<br>
  How can I do it in python?</p>