title: Pandas dataframe.loc : what does "Boolean list with the same length as the row axis" mean?
body: <p>Pandas documentation has this <code>Boolean list with the same length as the row axis</code> example, like so:</p>
  <pre><code>&gt;&gt;&gt; df = pd.DataFrame([[1, 2], [4, 5], [7, 8]],
  ...      index=['cobra', 'viper', 'sidewinder'],
  ...      columns=['max_speed', 'shield'])
  &gt;&gt;&gt; df
              max_speed  shield
  cobra               1       2
  viper               4       5
  sidewinder          7       8
  
  
  &gt;&gt;&gt; df.loc[[False, False, True]]
              max_speed  shield
  sidewinder          7       8
  
  </code></pre>
  <p>Can someone please explain how the <code>df.loc[[False, False, True]]</code> works to get the result shown please?</p>
  <p>Thanks.</p>