title: Difference between numpy.float and numpy.float64
body: <p>There seems to be a subtle difference between <code>numpy.float</code> and <code>numpy.float64</code>.</p>
  <pre><code>&gt;&gt;&gt; import numpy as np
  &gt;&gt;&gt; isinstance(2.0, np.float)
  True
  &gt;&gt;&gt; isinstance(2.0, np.float64)
  False
  </code></pre>
  <p>Can someone clarify this? Thanks</p>