ImportError: cannot import name 'Timestamp' : <p>I have ggplot successfully installed in my python 3.6.3 using the code below:</p>

<pre><code>conda install -c conda-forge ggplot 
</code></pre>

<p>But when I import it in my notebook using the code below, I get an error:</p>

<pre><code>from ggplot import *
ImportError: cannot import name 'Timestamp'
</code></pre>

<p>I would appreciate any idea on how I can solve this problem.</p>
