title: Replace Numerics in Pandas Series with Boolean
body: <p>Here is a toy series for illustrative purposes.</p>
  
  <pre><code>test = pd.Series([True, False, 2.2, 6.6, 0, True])
  </code></pre>
  
  <p>I have a Pandas series that contains True, False, and a bunch of different numeric values. I want to replace all numerics with False so that the entire column is Boolean. How do I accomplish this?
  I want it to end up like:</p>
  
  <pre><code>0     True
  1    False
  2    False
  3    False
  4    False
  5     True
  </code></pre>
  
  <p>Thanks!</p>