title: Why there are pip and conda packages after fresh installation?
body: <p>All</p>
  
  <p>Windows 10, 64bit, d/l Anaconda 2.5.0 with Python3, 64bit and installed it</p>
  
  <p>After fresh installation i type <code>conda list</code>, and, among packages, I see
  duplicates like </p>
  
  <pre><code>jupyter                   1.0.0                    py35_1
  jupyter-client            4.1.1                     &lt;pip&gt;
  jupyter-console           4.1.0                     &lt;pip&gt;
  jupyter-core              4.0.6                     &lt;pip&gt;
  jupyter_client            4.1.1                    py35_0
  jupyter_console           4.1.0                    py35_0
  jupyter_core              4.0.6                    py35_0
  </code></pre>
  
  <p>Is it normal, and why some packages (not all of them, just a few) have
  duplicates (not quite, there is <code>-</code> vs <code>_</code>) both in conda and pip?</p>
  
  <p>What will happen if I do <code>pip uninstall jupyter-core</code>?</p>
  
  <p>What should be policy toward such packages?</p>