title: AttributeError: module 'cv2' has no attribute 'VideoCapture'
body: <p>I had some problems with Opencv in Python.</p>
  <p>This attribute problem also happens with <code>imread</code></p>
  <p>I tried to uninstall and reinstall with contrib-Opencv,but it did not work.</p>
  <p>About 2 months ago, my opencv file still worked well, but I don't know why it doesn't work now.</p>
  <p>In the next reinstallations,this command always sastifies but no good results</p>
  <pre class="lang-py prettyprint-override"><code>import cv2
  cap = cv2.VideoCapture(0)
  ...
  cap.release()
  </code></pre>
  <p>My error command:</p>
  <pre class="lang-bash prettyprint-override"><code>Traceback (most recent call last):
    File &quot;C:\Users\Hoang Cao Chuyen\Documents\pyml\cv11.py&quot;, line 4, in &lt;module&gt;
      cap = cv2.VideoCapture(0)
  AttributeError: module 'cv2' has no attribute 'VideoCapture'
  [Finished in 0.2s with exit code 1]
  [shell_cmd: python -u &quot;C:\Users\Hoang Cao Chuyen\Documents\pyml\cv11.py&quot;]
  </code></pre>