title: What is numpy method int0?
body: <p>I've seen <code>np.int0</code> used for converting bounding box floating point values to int in OpenCV problems.</p>
  
  <p>What exactly is <code>np.int0</code>? </p>
  
  <p>I've seen <code>np.uint8</code>, <code>np.int32</code>, etc. I can't seem to find <code>np.int0</code> in any online documentation. What kind of int does this cast arguments to?</p>