title: PyCharm OpenCV- autocomplete with import cv2.cv2, no errors with import cv2
body: <p>I'm just getting started with PyCharm, python, and OpenCV, and I'm trying to set up my environment. I've installed all the necessary packages and I import OpenCV like so:</p>
  <pre><code>import cv2
  </code></pre>
  <p>However, this does not autocomplete and shows warnings that the method may be missing when called, BUT if I import like so:</p>
  <pre class="lang-py prettyprint-override"><code>import cv2.cv2
  </code></pre>
  <p>autocomplete <em>does</em> work, but running produces the following error:</p>
  <pre><code>Traceback (most recent call last):
    File &quot;C:/Users/dunnj/PycharmProjects/TransformApps/transformapps/blackwhite.py&quot;, line 1, in &lt;module&gt;
      import cv2.cv2 as cv2
  AttributeError: 'module' object has no attribute 'cv2'
  </code></pre>