cscPath='haarcascade_frontalface_default.xml'
faceCascade=cv2.CascadeClassifier(cscPath)
image=cv2.imread(file)
faces=faceCascade.detectMultiScale(
    image,
    scaleFactor=1.2,
    minNeighbors=5,
    minSize=(10,10),
    flags = cv2.cv.CV_HAAR_SCALE_IMAGE
)