title: Expand Variables in a List Python
body: <p>Need to know how to expand variable inside list element</p>
  
  <pre><code>  &gt;&gt;&gt; one_more = "four"
    &gt;&gt;&gt; var_names = ["one", "two", "three_&lt;expand variable one_more&gt;"]
  </code></pre>
  
  <p>should get something like </p>
  
  <pre><code>  ['one', 'two', 'three_four']
  </code></pre>