title: conflict while installing mayavi into anaconda
body: <p>Good day,
  My colleague asked my to install Anaconda and mayavi and I am novice with this topic and I decided to do the tasks on a new ubuntu installation</p>
  
  <p>Here are my tasks before my issue</p>
  
  <ol>
  <li>I fresh installed a Ubuntu 16.04</li>
  <li>I ran all update apt-get update/upgrade</li>
  <li>I created an user account (anna) and add it in sudo group</li>
  <li>I loged into anna account</li>
  <li>I downloaded Anaconda2-4.4.0-Linux-x86_64.sh for python 2.7</li>
  <li>I installed with the command sudo bash Anaconda2-4.4.0-Linux-x86_64.sh</li>
  <li>I installed anaconda in /opt/anaconda2 instead to the /home/anna/anaconda2 (for all user usage) and I say YES to have the line export PATH="/opt/anaconda2/bin:$PATH" in .bashrc file of anna</li>
  <li>I run source /home/anna/.bashrc</li>
  </ol>
  
  <p>After the anaconda installation, I could see a successful message regarding the installation</p>
  
  <p>Now my colleague asked me to install mayavi and she provided me the following link <a href="https://anaconda.org/anaconda/mayavi" rel="nofollow noreferrer">mayavi</a></p>
  
  <p>Then I simply enter the following command
  <code>conda install -c anaconda mayavi=4.5.0</code></p>
  
  <p>And here start my problem. I can not well understand the conflict but apparently there is a conflict and I have no idea how to solve it. Here is the command and the message</p>
  
  <pre><code>anna@pc17:~$ conda install -c anaconda mayavi=4.5.0
  Fetching package metadata ...........
  Solving package specifications: .
  
  UnsatisfiableError: The following specifications were found to be in conflict:
    - mayavi 4.5.0* -&gt; pyqt 4.* -&gt; qt &gt;=4.8.6,&lt;5.0
    - mayavi 4.5.0* -&gt; pyqt 4.* -&gt; sip &gt;=4.16.4,&lt;4.18
    - navigator-updater -&gt; pyqt &gt;=5.6 -&gt; qt 5.6.*
  Use "conda info &lt;package&gt;" to see the dependencies for each package.
  </code></pre>
  
  <p>I have no idea what does mean the above message and how to solve me problem.
  Is there depencies that I have to additionally install?</p>
  
  <p>For information the above command return me this:</p>
  
  <pre><code>anna@cryospc17:~$ python --version
  Python 2.7.13 :: Anaconda 4.4.0 (64-bit)
  anna@cryospc17:~$ python3 --version
  Python 3.5.2
  </code></pre>
  
  <p>Did I correctly try t install mayavi?</p>
  
  <p>Thank a lot for any help you can provide me</p>