在用torch.distributed.init_process_group(backend='nccl', init_method='env://', world_size=world_size, rank=rank)时，出现
1、ValueError: Error initializing torch.distributed using env:// rendezvous: environment variable MASTER_ADDR expected, but not set
解决
加入
os.environ['MASTER_ADDR'] = 'localhost'
2、ValueError: Error initializing torch.distributed using env:// rendezvous: environment variable MASTER_PORT expected, but not set
解决
加入
os.environ['MASTER_PORT'] = '12345'
标签：swin,initializing,torch,distributed,MASTER,env,rendezvous,using From： https://www.cnblogs.com/ltkekeli1229/p/17778506.html