title: Cannot import "pickle" to a script in pycharm
body: <p>I am currently learning python and was intruduced to pickle.
  I tried to import it in pycharm but the statement remaned grey even after the statement was "used" (I added a dump() statement). I then went into the pycharm project interpreter settings where pip and setuptools was already installed. Then I tried to add "pickle" but there weren´t any results showing for it when searching. I had the same trouble with "turtle" some time ago. What could be the reasons for that?
  That´s my code:</p>
  
  <pre><code>import pickle
  file = open("D:\Data\...", "wb")
  number = 12
  dump(number, file)
  file.close()
  </code></pre>