训练时报错AttributeError: _2D；

fa = face_alignment.FaceAlignment(face_alignment.LandmarksType._2D, flip_input=False)

报错原因：

face_alignment库1.4.0已经更新调用方法，没有_2D

修改：

fa = face_alignment.FaceAlignment(face_alignment.LandmarksType.TWO_D, flip_input=False)

报错详情：

Traceback (most recent call last):
  File "data_utils/process.py", line 393, in <module>
    extract_landmarks(ori_imgs_dir)
  File "data_utils/process.py", line 50, in extract_landmarks
    fa = face_alignment.FaceAlignment(face_alignment.LandmarksType._2D, flip_input=False)
  File "/root/miniconda3/lib/python3.8/enum.py", line 384, in __getattr__
    raise AttributeError(name) from None
AttributeError: _2D