AssertionError: 未找到 checkpoint 目录!

当我运行 style.py 时： Python style.py --style path/to/style/img.jpg --checkpoint-dir checkpoint/path --test path/to/test/img.jpg --test-dir path/to/test/dir --content-weight 1.5e1 --checkpoint-iterations 1000 --batch-size 20 问题：追踪（最近一次调用）： File "style.py", line 167, in main() File "style.py", line 115, in main check_opts(options) File "style.py", line 91, in check_opts exists(opts.checkpoint_dir, "checkpoint dir not found!") File "src/utils.py", line 26, in exists assert os.path.exists(p), msg AssertionError: checkpoint dir not found！