title: How to store an array in hdf5 file which is too big to load in memory?
body: <p>Is there any way to store an array in an hdf5 file, which is too big to load in memory?</p>
  
  <p>if I do something like this</p>
  
  <pre><code>f = h5py.File('test.hdf5','w')
  f['mydata'] = np.zeros(2**32)
  </code></pre>
  
  <p>I get a memory error.</p>