title: ModuleNotFoundError: No module named '_tkinter' on python 3.8.0 mac OS 10.15.3
body: <p>Using Python 3.8.0 on Mac OS 10.15.3 (Catalina) with pyenv.</p>
  
  <p>When I try to run a file, it returns:</p>
  
  <pre><code>ModuleNotFoundError: No module named '_tkinter'
  </code></pre>
  
  <p>I've tried <code>brew install tcl-tk</code>. I'm a little worried that because I'm running python on top of pyenv, any third party tkinter module doesn't get run properly.</p>
  
  <p>Running <code>brew doctor</code> returned:</p>
  
  <pre><code>Having additional scripts in your path can confuse software installed via
  Homebrew if the config script overrides a system or Homebrew-provided
  script of the same name. We found the following "config" scripts:
    `/Users/jm/.pyenv/shims/python3.7-config
    /Users/jm/.pyenv/shims/python3.7m-config
    /Users/jm/.pyenv/shims/python-config
    /Users/jm/.pyenv/shims/python3-config
    /Users/jm/.pyenv/shims/python3.8-config`
  </code></pre>