title: Check if any item in Python list is None (but include zero)
body: <p>I'm trying to do a simple test that returns <code>True</code> if any of the results of a list are <code>None</code>.  However, I want <code>0</code> and <code>''</code> to not cause a return of <code>True</code>.</p>
  
  <pre><code>list_1 = [0, 1, None, 4]
  list_2 = [0, 1, 3, 4]
  
  any(list_1) is None
  &gt;&gt;&gt;False
  any(list_2) is None
  &gt;&gt;&gt;False
  </code></pre>
  
  <p>As you can see, the <code>any()</code> function as it is isn't being helpful in this context.  </p>