title: OpenCV's extra module cv2.face is not known
body: <blockquote>
    <p>Traceback (most recent call last):
      File "C:\Users\asus\Google Drive\Miroir intelligent\code\Reconnaissance faciale\PyFaceRec-master\SimpleFaceRecognition\simple_face_recognition.py", line 58, in 
        recognizer = cv2.face.createFisherFaceRecognizer()
    AttributeError: module 'cv2.cv2' has no attribute 'face'</p>
  </blockquote>
  
  <pre><code>    collector = cv2.face.StandardCollector_create()
  </code></pre>