title: Python on RasPi can't find installed module
body: <p>I feel like this has to have been asked and solved already, but I couldn't find a solution that works for me. I pip3'd a python library, and verify it is indeed on my system.</p>
  <pre><code>pi@raspberrypi:~/Desktop $ pip3 install pyftpdlib
  Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
  Requirement already satisfied: pyftpdlib in /home/pi/.local/lib/python3.7/site-packages (1.5.6)
  </code></pre>
  <p>Then I try to import it but raspi cant find it...</p>
  <pre><code>pi@raspberrypi:~/Desktop $ sudo python3 FTPserver2.py
  Traceback (most recent call last):
    File &quot;FTPserver2.py&quot;, line 1, in &lt;module&gt;
      import pyftpdlib
  ModuleNotFoundError: No module named 'pyftpdlib'
  </code></pre>
  <p>Huh?</p>