报错：
face_recognizer = cv.face.LBPHFaceRecognizer_create()
AttributeError: module 'cv2' has no attribute 'face'
解决方法：
方法1.尝试终端安装：pip install opencv-contrib-python
方法2.全部卸载重装：终端依次执行
pip uninstall opencv-contrib-python
pip uninstall opencv-python
pip install opencv-python
pip install opencv-contrib-python
方法3.看看别的csdn解决方案！！！
