title: How to get the second digit of a number or string in python?
body: <p>Is there any good idea how to get the second digit of a string?
  For example:</p>
  
  <pre><code>aaa = 122
  bbb = 333
  
  rest = bbb-aaa 
  if rest[:2] == 1: 
      do something..
  </code></pre>