title: instancemethod object has no attribute '___getitem__'
body: <p>I am on PyCharm (community edition 4.0.2) retrieving data from a .fits file.
  z = data.field [SDSS_Z] results in 
  TypeError: 'instancemethod' object has no attribute '<strong>getitem</strong>'.
  On other Field of the same .fits file I have no problems</p>
  
  <pre><code>import pyfits
  import pylab as plt
  import numpy as np
  plt.close('all')
  hdu = pyfits.open('cat.v9.group_v22.fits')
  
  print hdu[1].columns
  
  data = hdu[1].data
  
  u = data.field('U')
  r = data.field('R')
  k = data.field('LOG_MSTELLAR_KS')
  morph = data["GZ1_MORPHOLOGY"]              
  lum = data["L_O3"]                          
  z = data.field ["SDSS_Z"]
  </code></pre>