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強化学習で作成した学習モデルを、別のPC環境で実行しようとしたときにエラー(`RuntimeError: Attempting to deserialize object on a CUDA device but torch.cuda.is_available() is False...`)

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強化学習で作成した学習モデルを、別のPC環境で実行しようとしたときにエラー(RuntimeError: Attempting to deserialize object on a CUDA device but torch.cuda.is_available() is False...

$ python do.py
...
RuntimeError: Attempting to deserialize object on a CUDA device but torch.cuda.is_available() is False. If you are running on a CPU-only machine, please use torch.load with map_location=torch.device('cpu') to map your storages to the CPU.
...

エラーメッセージ記載の通り、
please use torch.load with map_location=torch.device('cpu')すればOK

before

def torch_load(file_name):
    with open(file_name, 'rb') as f:
        return torch.load(f)

after

def torch_load(file_name):
    with open(file_name, 'rb') as f:
        return torch.load(f, torch.device('cpu')) 

CPU環境なので性能は落ちるかもしれないが、これでひとまず動くので評価はできそう。

参考

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