title: How to create a numpy record array from C
body: <p>On the Python side, I can create new numpy record arrays as follows:</p>
  
  <pre><code>numpy.zeros((3,), dtype=[('a', 'i4'), ('b', 'U5')])
  </code></pre>
  
  <p>How do I do the same from a C program?  I suppose I have to call <code>PyArray_SimpleNewFromDescr(nd, dims, descr)</code>, but how do I construct a <code>PyArray_Descr</code> that is appropriate for passing as the third argument to <code>PyArray_SimpleNewFromDescr</code>?</p>