title: No name 'QApplication' in module 'PyQt5.QtWidgets' error in Pylint
body: <p>Running into this issue in VS Code while trying to learn PyQt5, "No name 'QApplication' in module 'PyQt5.QtWidgets'", "No name 'QWidget' in module 'PyQt5.QtWidgets'"".</p>
  
  <p>I'm not sure if this is a pylint issue or something else. I've confirmed PyQt5 is installed with pip3 list but I can't seem to figure out the issue. </p>
  
  <pre><code>import sys
  from PyQt5.QtWidgets import QApplication, QWidget
  
  def app():
    my_app = QApplication(sys.argv)
    w = QWidget()
    w.setWindowTitle("Test")
    w.show()
    sys.exit(my_app.exec_())
  app()
  </code></pre>
  
  <p>I'd expect this error to not keep displaying but its preventing me from running things in VS Code. Any help or suggestions appreciated. </p>