title: pip install a specific version of PyQt5
body: <p>I am using spyder &amp; want to install finplot. However when I did this I could not open spyder and had to uninstall &amp; reinstall anconda.</p>
  <p>The problem is to do with PyQt5 as I understand. The developer of finplot said that one solution would be to install PyQt5 version 5.9.</p>
  <blockquote>
  <p>Error: spyder 4.1.3 has requirement pyqt5&lt;5.13; python_version &gt;= &quot;3&quot;, but you'll have pyqt5 5.13.0 which is incompatible</p>
  </blockquote>
  <p>My question is how would I do this? To install finplot I used the line below,</p>
  <blockquote>
  <p>pip install finplot</p>
  </blockquote>
  <p>Is there a way to specify that it should only install PyQt5?</p>