问题：
(yanzhi) C:\Users\17648>pip3 install torch torchvision torchaudio --index-url https://download.pytorch.org/whl/cu121
Looking in indexes: https://download.pytorch.org/whl/cu121
ERROR: Could not find a version that satisfies the requirement torch (from versions: none)
ERROR: No matching distribution found for torch
解决：
python版本太高，降低版本即可
(yanzhi) C:\Users\17648>conda install python==3.11
