python3 UnicodeDecodeError: 'ascii' codec can't decode byte 0xe9 in position 0

心已赠人 2022-03-17 03:43 123阅读 0赞

# 源码 #

if os.path.isfile(model_path):
                print('==> loading checkpoint {}'.format(args.resume))
                checkpoint = torch.load(model_path)
                start_epoch = checkpoint['epoch']
                net.load_state_dict(checkpoint['net'])
        else:
                print('==> no checkpoint found at {}'.format(args.resume))

# 问题 #

Traceback (most recent call last):
      File "train_img_model_xent.py", line 251, in <module>
        main()
      File "train_img_model_xent.py", line 136, in main
        checkpoint = torch.load(model_path)
      File "C:\Users\Liang\Anaconda3\lib\site-packages\torch\serialization.py", line 268, in load
        return _load(f, map_location, pickle_module)
      File "C:\Users\Liang\Anaconda3\lib\site-packages\torch\serialization.py", line 421, in _load
        result = unpickler.load()
        
    UnicodeDecodeError: 'ascii' codec can't decode byte 0xe9 in position 0: ordinal not in range(128)

# 原因 #

python版本不兼容，源码python版本低，现有环境python版本高  
python3 取消了reload，在编码解码方法做了很大的调整

# 解决办法 #

按照要求打开 .\\torch\\[serialization.py][] 找出错误代码段

_sys_info = pickle_module.load(f)
        unpickler = pickle_module.Unpickler(f)
        unpickler.persistent_load = persistent_load
        result = unpickler.load()

torch库函数 **[serialization.py][]** 改成

_sys_info = pickle_module.load(f, encoding='iso-8859-1')  # 改动处
        unpickler = pickle_module.Unpickler(f, encoding='iso-8859-1')  # 改动处
        unpickler.persistent_load = persistent_load
        result = unpickler.load()

**源码** 改成

if os.path.isfile(model_path):
                print('==> loading checkpoint {}'.format(args.resume))
                checkpoint = torch.load(model_path)
                start_epoch = checkpoint['epoch']
                net.load_state_dict(checkpoint['net'],strict=False)  # 改动处
     else:
                print('==> no checkpoint found at {}'.format(args.resume))

# 注意事项 #

如果不改源码 \*.load\_state\_dict（）会出错，如下

Traceback (most recent call last):
      File "E:/wj-lab/expStad/test.py", line 79, in <module>
        net.load_state_dict(checkpoint['net'])
      File "D:\Anaconda3\envs\python35\lib\site-packages\torch\nn\modules\module.py", line 721, in load_state_dict
        self.__class__.__name__, "\n\t".join(error_msgs)))
    RuntimeError: Error(s) in loading state_dict for embed_net:
    	Missing key(s) in state_dict: * * *
    	Unexpected key(s) in state_dict: "visible_net.visible.bn1.num_batches_tracked", "visible_net.visible.layer1.0.bn1.n

[serialization.py]: http://serialization.py