title: How to import _udunits2 on Google Colab?
body: <p>I am trying to import _udunits2 on Google Colab. I have managed to install it through Conda. However, after successful installation, when I attempt to import the package, it returns this error message:</p>
  <pre><code>ImportError                               Traceback (most recent call last)
  &lt;ipython-input-40-f9eb376cf338&gt; in &lt;module&gt;()
  ----&gt; 1 from cf_units import _udunits2
  
  /usr/local/lib/python3.6/site-packages/cf_units/__init__.py in &lt;module&gt;()
       43 from .util import _OrderedHashable, approx_equal
       44 
  ---&gt; 45 from cf_units import _udunits2 as _ud
       46 from cf_units._udunits2 import (UT_ASCII, UT_ISO_8859_1, UT_LATIN1, UT_UTF8,
       47                                 UT_NAMES, UT_DEFINITION)
  
  ImportError: cannot import name '_udunits2' from 'cf_units' (/usr/local/lib/python3.6/site-packages/cf_units/__init__.py)
  </code></pre>
  <p>Anyone have any ideas on how to import this package?</p>