title: cannot install and use module 'openpyxl' in Python 3.7
body: <p>For the life of me, I cannot install and use module '<code>openpyxl</code>' in Python 3.7 / Windows / and Anaconda. </p>
  
  <p>When I try to run and or debug my program I am consistently error-ed out on:</p>
  
  <pre><code>    import openpyxl
  ModuleNotFoundError: No module named 'openpyxl'
  </code></pre>
  
  <p>Although within my Terminal or Anaconda Prompt: It says its installed and requirements already met. <em>i.e. the below</em></p>
  
  <pre><code>Requirement already satisfied: openpyxl in c:\users\MYSELF\appdata\local\continuum\anaconda3\lib\site-packages (2.6.2)
  Requirement already satisfied: jdcal in c:\users\MYSELF\appdata\local\continuum\anaconda3\lib\site-packages (from openpyxl) (1.4)
  Requirement already satisfied: et-xmlfile in c:\users\MYSELF\appdata\local\continuum\anaconda3\lib\site-packages (from openpyxl) (1.0.1)
  
  (base) C:\MYSELF\language\python\MLTSS-PDF-Split&gt;pip install openpyxl
  Requirement already satisfied: openpyxl in c:\users\MYSELF\appdata\local\continuum\anaconda3\lib\site-packages (2.6.2)
  Requirement already satisfied: jdcal in c:\users\MYSELF\appdata\local\continuum\anaconda3\lib\site-packages (from openpyxl) (1.4)
  Requirement already satisfied: et-xmlfile in c:\users\MYSELF\appdata\local\continuum\anaconda3\lib\site-packages (from openpyxl) (1.0.1)
  
  (base) C:\gitViews\language\python\MLTSS-PDF-Split&gt;pip3 install openpyxl
  Requirement already satisfied: openpyxl in c:\users\MYSELF\appdata\local\continuum\anaconda3\lib\site-packages (2.6.2)
  Requirement already satisfied: et-xmlfile in c:\users\MYSELF\appdata\local\continuum\anaconda3\lib\site-packages (from openpyxl) (1.0.1)
  Requirement already satisfied: jdcal in c:\users\MYSELF\appdata\local\continuum\anaconda3\lib\site-packages (from openpyxl) (1.4)
  </code></pre>
  
  <p>I have tried uninstalling and reinstalling, I have tried using <code>pip</code> and <code>pip3</code>.</p>
  
  <p>I have tried using <code>trusted host</code>.</p>
  
  <p>I get no error on the import line within Visual Studio Code; i.e.</p>
  
  <pre><code>import openpyxl
  </code></pre>
  
  <p><strong>Why cannot use this module ?</strong></p>