title: Why sorting on small numbers does not work?
body: <p>It looks like Pandas sorting does not work any more:</p>
  
  <pre><code>import pandas as pd
  from numpy import random
  sample = random.uniform(low=0.0, high=1.0, size=(100,))
  ranking = pd.DataFrame(sample, columns=['random']).sort_values(by='random', ascending='False')
  print(ranking.head())
  
        random
  18  0.024665
  71  0.028709
  51  0.037635
  48  0.038073
  57  0.072323
  </code></pre>
  
  <p>I would instead expect the reverse order, because of <code>ascending=False</code>.</p>
  
  <p>I'm using pandas 0.25.0.</p>