title: recognize python in env
body: <p>I make env
  by pipenv install
  and I join env
  by pipenv shell</p>
  <p>I got some troubles in pipenv shell with no module error.
  so I did many trials.
  and I find something wrong.</p>
  <p><a href="https://i.stack.imgur.com/Tgby2.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Tgby2.png" alt="enter image description here" /></a>
  this is the status in my local PC.
  when I type python3, it export the path in the virtual env.</p>
  <p><a href="https://i.stack.imgur.com/XbNdH.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/XbNdH.png" alt="enter image description here" /></a>
  this is the web server has troubles.
  when I type python3, it export the path outside of the virtual env.</p>
  <p>what's the matter and how can I fix it?</p>