title: ModuleNotFoundError: No module named 'telegram.ext'; 'telegram' is not a package
body: <p>I tried:</p>
  <ul>
  <li>pip install python-telegram-bot</li>
  <li>pip3 install python-telegram-bot</li>
  <li>pip install telegram</li>
  <li>pip3 install telegram</li>
  </ul>
  <p>But the error keeps showing up telling me there is no such package of 'telegram.ext' offered by python-telegram-bot.
  However, my text editor with python plugin is able to find the package telegram.ext in my environment. I also tried using command prompt dirtectly on that virtual environment I created, still doesn't work.
  Seems that this same issue is faced by other posts on internet without any resolve.</p>
  <p><a href="https://i.stack.imgur.com/R8vkA.png" rel="nofollow noreferrer">my text editor plugin can find the package</a></p>