title: numpy check all elements are False
body: <p>I have a <code>numpy</code> 1-D array containing boolean values of <code>True</code> or <code>False</code>. I want to check whether all of them are <code>False</code> such that a single <code>True/False</code> is returned whether all elements in the <code>numpy</code> array are False or True</p>
  
  <pre><code>x = np.array([False, False, False])  # this should return True, since all values are False
  y = np.array([True, True, True])  # this should return False, since all values are True
  z = np.array([True, False, True]) # this should return False, since not all values are False
  </code></pre>
  
  <p>I looked into <code>np.all()</code>, but that does not see to solve my problem.</p>
  
  <p>Thanks!</p>