title: Error about 'CategoricalDtype' when importing Pandas on Raspberry PI
body: <p>I am having errors getting Pandas installed on my PI</p>
  
  <p>First ran:
  sudo pip3 install pandas</p>
  
  <p>Then this to get Numpy working:
  sudo apt-get install libatlas-base-dev</p>
  
  <p>Numpy can import now but I get the following error with Pandas:</p>
  
  <pre><code>    &gt;&gt;&gt; import pandas
      Traceback (most recent call last):
        File "&lt;pyshell#0&gt;", line 1, in &lt;module&gt;
          import pandas
        File "/home/pi/.local/lib/python3.5/site-packages/pandas/__init__.py",         line 42, in &lt;module&gt;
          import pandas.core.config_init
        File "/home/pi/.local/lib/python3.5/site-        packages/pandas/core/config_init.py", line 13, in &lt;module&gt;
          import pandas.core.config as cf
        File "/home/pi/.local/lib/python3.5/site-        packages/pandas/core/config.py", line 807, in &lt;module&gt;
          is_text = is_instance_factory((str, bytes))
        File "/home/pi/.local/lib/python3.5/site-        packages/pandas/core/config.py", line 778, in is_instance_factory
          from pandas.core.common import pprint_thing
        File "/home/pi/.local/lib/python3.5/site-        packages/pandas/core/common.py", line 23, in &lt;module&gt;
          from pandas.core.dtypes import CategoricalDtype,         CategoricalDtypeType, DatetimeTZDtype, DatetimeTZDtypeType
      ImportError: cannot import name 'CategoricalDtype'
  </code></pre>
  
  <p>Any suggestions?</p>