使用modelscope快速开始文档示例：https://modelscope.cn/docs/intro/quickstart

魔搭平台免费实例PAI-DSW CPU环境：
ubuntu22.04-py311-torch2.3.1-1.27.0

!pip show transformers
!pip show modelscope
显示信息为：
Name: transformers
Version: 4.52.4
Name: modelscope
Version: 1.27.0

执行下载模型，成功：

from modelscope import snapshot_download
model_dir = snapshot_download("Qwen/Qwen2.5-0.5B-Instruct")

加载模型，失败：

model_name = "Qwen/Qwen2.5-0.5B-Instruct"

try:
model = AutoModelForCausalLM.from_pretrained(
model_name,
torch_dtype="auto",
device_map="auto"
)
except Exception as e:
print(f"Model 加载失败: {e}")
sys.exit(11)
报错:
Downloading Model from https://www.modelscope.cn to directory: /mnt/workspace/.cache/modelscope/models/Qwen/Qwen2.5-0.5B-Instruct
2025-06-24 19:46:50,872 - modelscope - INFO - Target directory already exists, skipping creation.
Model 加载失败: argument of type 'NoneType' is not iterable