title: Greater than or equal for floats failed
body: <p>I was running a small python test I wrote against some data and got some weird results.  Boiled it down to this:</p>
  
  <pre><code>priceDiff = 219.92 - 219.52
  if(priceDiff &gt;= .40):
     print "YES"
  else:
     print "NO"
  </code></pre>
  
  <hr>
  
  <p>The result is "NO"</p>
  
  <p>Why is 0.40 not >= .40?</p>