title: ImportError: Missing optional dependency 'openpyxl' still doesn't work after instllation
body: <p>ubuntu 18.04, python3.8 and using pycharm.</p>
  <p>Interpreter path in pychamr is correctly set.</p>
  <p>while trying to read specific sheet in excel, using openpyxl it keeps on giving me ImportError.
  <code>ImportError: Missing optional dependency 'openpyxl'.  Use pip or conda to install openpyxl.</code></p>
  <p>I've installed using <code>pip3 install openpyxl</code> and it say requirement is already satisfied.
  However when I run it again in pycharm it still outputs same error.</p>
  <pre><code>Requirement already satisfied: openpyxl mycomp/.local/lib/python3.8/site-packages (3.0.7)
  Requirement already satisfied: et-xmlfile in mycomp/.local/lib/python3.8/site-packages (from openpyxl) (1.0.1)
  </code></pre>
  <p>My guess is since I am using venv it is not getting installed correctly in venv because when I look at the path upon install it is not where venv is.</p>
  <p>When I do pip3 freeze on venv and after deactivating venv it looks like it has same installation.</p>