CUDA 10.2.
I was figure out why this situation happened. There are two version pytorch installed on my PC, the pytorch  pytorch=1.6.0=py3.8_cuda102_cudnn7_0 and pytorch=1.6.0=cpu_py38h538a6d7_0 in different conda environment. But I stiil don’t know why this happend when I use different console in the same conda environment. Is there any differernt when using IPython with Python ?