title: Trouble shooting when tring to install and import `stats_exporter` from `opencensus.ext.stackdriver`
body: <p>Im trying to install and use <code>stats_exporter</code> from <code>opencensus.ext.stackdriver</code> using the following guide: <a href="https://github.com/census-instrumentation/opencensus-python/tree/master/contrib/opencensus-ext-stackdriver" rel="nofollow noreferrer">opencensus-ext-stackdriver</a></p>
  
  <p>after installing it through pip:</p>
  
  <p><code>pip install opencensus-ext-stackdriver</code> </p>
  
  <p>Im trying to import it and:</p>
  
  <pre><code>from opencensus.ext.stackdriver import stats_exporter as stackdriver
  ImportError: cannot import name 'stats_exporter' from 'opencensus.ext.stackdriver'
  </code></pre>
  
  <p>When comparing the Git repo, and my local <code>venv/lib/python3.7/site-packages/...</code>   it seems like the pip version isn't compatible with Github , so i tried to install it though cloning, and using <code>setup.py</code></p>
  
  <pre><code>pip install ../opencensus-python/contrib/opencensus-ext-stackdriver/dist/opencensus-ext-stackdriver-0.2.dev0.tar.gz
  </code></pre>
  
  <p>which gives me the following error:</p>
  
  <pre><code>(venv) Yehoshaphats-MacBook-Pro:present-value yehoshaphatschellekens$ pip install ../opencensus-python/contrib/opencensus-ext-stackdriver/dist/opencensus-ext-stackdriver-0.2.dev0.tar.gz 
  Processing /Users/yehoshaphatschellekens/opencensus-python/contrib/opencensus-ext-stackdriver/dist/opencensus-ext-stackdriver-0.2.dev0.tar.gz
      Complete output from command python setup.py egg_info:
      Traceback (most recent call last):
        File "&lt;string&gt;", line 1, in &lt;module&gt;
        File "/private/var/folders/s2/y6vcdc1105s8xlpb12slr9z00000gn/T/pip-req-build-7m1ibdpd/setup.py", line 17, in &lt;module&gt;
          from version import __version__
      ModuleNotFoundError: No module named 'version'
  
      ----------------------------------------
  Command "python setup.py egg_info" failed with error code 1 in /private/var/folders/s2/y6vcdc1105s8xlpb12slr9z00000gn/T/pip-req-build-7m1ibdpd/
  </code></pre>
  
  <p>Similar errors of this type indicated that i need to upgrade <code>setuptools</code>, tried that also :(</p>
  
  <p><a href="https://stackoverflow.com/questions/32423793/importerror-no-module-named-version">This post</a> suggests that it might related to the fact that i'm using python3, which isn't completable with <code>version</code> though i really need to install this package on my python3 venv.</p>
  
  <p>Any Help on this issue would be great!</p>