title: Exception 'HDFStore requires PyTables ' when using HDF5 file in iPython
body: <p>I am very new to Python and am trying to create a table in pandas with HDFStore as follows</p>
  
  <pre><code>store = HDFStore('store.h5')
  </code></pre>
  
  <p>I get the exception :</p>
  
  <pre><code>Exception                                 Traceback (most recent call last)
  C:\Python27\&lt;ipython-input-11-de3060b689e6&gt; in &lt;module&gt;()
  ----&gt; 1 store = HDFStore('store.h5')
  
  C:\Python27\lib\site-packages\pandas-0.10.1-py2.7-win32.egg\pandas\io\pytables.pyc in __init__(self, path, mode, complevel, complib, fletcher32)
      196             import tables as _
      197         except ImportError:  # pragma: no cover
  --&gt; 198             raise Exception('HDFStore requires PyTables')
      199 
      200         self.path = path
  
  Exception: HDFStore requires PyTables 
  </code></pre>
  
  <p>I already have Pytables installed and it is present in site-packages. Both pandas(0.l0.1) and pytables(2.4.0) are 32 bit Windows versions. Python version is 2.7.3 for 32 bit windows</p>
  
  <p>I am running this using ipython notebook.</p>
  
  <p>I forgot to add that I have Windows 7 - 64 bit OS, but Python and all its related add-ons are 32 bit.</p>