title: Concat string if condition, else do nothing
body: <p>I want to concat few strings together, and add the last one only if a boolean condition is True.
  Like this (a, b and c are strings):</p>
  
  <pre><code>something = a + b + (c if &lt;condition&gt;)
  </code></pre>
  
  <p>But Python does not like it. Is there a nice way to do it without the else option?</p>
  
  <p>Thanks! :)</p>