title: Cant install python3-pyqt5 on ubuntu 17
body: <p>I`m trying to install python3-pyqt5, but still getting the same error. I tried reinstalling ubuntu, updating and upgrading my apt-get and still no clue whats wrong.</p>
  
  <pre><code>ubuntu@ubuntu:~$ sudo apt-get install python3-pyqt5
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  E: Unable to locate package python3-pyqt5
  </code></pre>