title: how to create python empty dataframe where df.empty results in True
body: <p>How can I create an empty dataframe in python such that the test <code>df.empty</code> results <code>True</code>?</p>
  
  <p>I tried this:</p>
  
  <pre><code>df = pd.DataFrame(np.empty((1, 1)))
  </code></pre>
  
  <p>and <code>df.empty</code> results in <code>False</code>.</p>