title: python how can return first value = true in a list?
body: <p>like this:<br>
  if list is <code>['', 'a', 'b']</code> return <code>'a'</code><br>
  if list is <code>['', '', '']</code> return <code>''</code><br>
  if list is <code>['a', 'b', 'c']</code> return <code>a</code><br>
  is any method in python to do this?<br>
  I mean don't need I write function myself<br>
  I want a built-in method like <code>var a = b || c</code> in <code>javascript</code></p>