title: PyCharm doesn't recognize module gc
body: <p>I am trying to use <code>gc</code> module and it works both in debug and normal runs. Unfortunately, PyCharm itself doesn't see this module exists and complains on it:</p>
  
  <p><a href="https://i.stack.imgur.com/FjDlP.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/FjDlP.png" alt="enter image description here"></a></p>
  
  <p><strong>UPDATE</strong></p>
  
  <p>I was unable to install <code>gc</code> with neither <code>pip install gc</code>, not <code>conda install gc</code>, although it is working. I decided this package is built-in.</p>