安装报错
按PyTorch官网给出的命令
pip3 install torch torchvision torchaudio --index-url https://download.pytorch.org/whl/cu118
报错
ERROR: Could not find a version that satisfies the requirement torch (from versions: none)
ERROR: No matching distribution found for torch
原因:当前python版本过低(我是3.6)
解决方法:用Anaconda重新建一个Python高版本环境(比如3.10)
RuntimeError: Distributed package doesn't have NCCL built in
我的是Windows系统,不支持nccl
在运行的py文件最开始加代码
import os
os.environ["PL_TORCH_DISTRIBUTED_BACKEND"] = "gloo"
修改类似地方,把nccl改成gloo
torch.distributed.init_process_group("nccl")