Exception has occurred: ModuleNotFoundError，No module named 'paddle.nn'

[chch2010523]

运行gnn的例子时，提示报错Exception has occurred: ModuleNotFoundError，No module named 'paddle.nn' 我的环境是 1080TI Ubuntu20.04 nvcc: NVIDIA (R) Cuda compiler driver Copyright (c) 2005-2021 NVIDIA Corporation Built on Fri_Dec_17_18:16:03_PST_2021 Cuda compilation tools, release 11.6, V11.6.55 Build cuda_11.6.r11.6/compiler.30794723_0 NVIDIA-SMI 510.39.01 Driver Version: 510.39.01 CUDA Version: 11.6 在conda中安装了paddlepaddle-gpu版本2.3.1 paddle-bfloat 0.1.7 pypi_0 pypi paddlehelix 1.0.1 pypi_0 pypi paddlepaddle-gpu 2.3.1.post116 pypi_0 pypi pandas 1.3.5 pypi_0 pypi pgl 2.2.3.post0 pypi_0 pypi