title: How can I access a numpy array column by name?
body: <p>I´ve this numpy array:</p>
  
  <pre><code>array([((-24560412,   18229,   62, 198, 201, 5, -1,   6, 1, 239176.42401979),),
     ...,
     ((-25883120, -681084, 2583, 278, 201, 5,  1, 255, 1, 239424.37447651),)],
    dtype=[('point', [('X', '&lt;i4'), ('Y', '&lt;i4'), ('Z', '&lt;i4'), ('intensity', '&lt;u2'), ('flag_byte', 'u1'), ('raw_classification', 'u1'), ('scan_angle_rank', 'i1'), ('user_data', 'u1'), ('pt_src_id', '&lt;u2'), ('gps_time', '&lt;f8')])])
  </code></pre>
  
  <p>How can I access Z column values as an array, like points['Z']?</p>