Update app.py

app.py

@@ -52,6 +52,8 @@ if img_file_buffer is not None:
             # show the name on image to user 
             y1, x2, y2, x1 = faceLoc
             y1, x2, y2, x1 = y1 * 4, x2 * 4, y2 * 4, x1 * 4
+            if not image.flags.writeable:
+              image.setflags(write=True)
             cv2.rectangle(image , (x1, y1), (x2, y2), (0, 255, 0), 2)
             #cv2.rectangle(image , (x1, y2 - 35), (x2, y2), (0, 255, 0), cv2.FILLED)
             #cv2.putText(image , name, (x1 + 6, y2 - 6), cv2.FONT_HERSHEY_COMPLEX, 1, (255, 255, 255), 2)