Tried using the class 'DetectFace'

+import cv2
+from detect_face import DetectFace
+
+image = "res/irene.jpg"
+
+# Create an instance
+df = DetectFace("shape_predictor_68_face_landmarks.dat", image)
+
+# Try: Extract mouth part
+mouth = df.extract_face_part(df.mouth)
+cv2.imshow("Mouth", mouth)
+cv2.waitKey(0)
+
+# Try: Extract right eye part
+r_eye = df.extract_face_part(df.right_eye)
+cv2.imshow("Right eye", r_eye)
+cv2.waitKey(0)