我按照系统，cuda版本等安装了gpu版本的paddle，import的时候出错，第一次用这个paddle，谷歌，百度也搜不到我想要的答案，求帮助。错误如下：

“File "/home/ateam/code/PaddleSeg-release-2.5/Matting/train.py", line 21, in
import paddle
File "/home/ateam/anaconda3/envs/py36/lib/python3.6/site-packages/paddle/__init__.py", line 47, in
import paddle.distribution # noqa: F401
File "/home/ateam/anaconda3/envs/py36/lib/python3.6/site-packages/paddle/distribution/__init__.py", line 15, in
from paddle.distribution import transform
File "/home/ateam/anaconda3/envs/py36/lib/python3.6/site-packages/paddle/distribution/transform.py", line 24, in
from paddle.distribution import (constraint, distribution,
File "/home/ateam/anaconda3/envs/py36/lib/python3.6/site-packages/paddle/distribution/distribution.py", line 33, in
from paddle.fluid.framework import _non_static_mode, in_dygraph_mode
ImportError: cannot import name '_non_static_mode'”