ValueError: num_samples should be a positive integer value, but got num_samples

请问：
在代码运行的过程中出现以下报错，是哪里出现问题了呢？

Traceback (most recent call last):
  File "D:/Downloads/prnet-master/main.py", line 177, in 
    main()
  File "D:/Downloads/prnet-master/main.py", line 145, in main
    train_loader = DataLoader(ModelNet40(num_points=args.n_points,
  File "D:\pythonproject3.8\lib\site-packages\torch\utils\data\dataloader.py", line 353, in __init__
    sampler = RandomSampler(dataset, generator=generator)  # type: ignore[arg-type]
  File "D:\pythonproject3.8\lib\site-packages\torch\utils\data\sampler.py", line 109, in __init__
    raise ValueError("num_samples should be a positive integer "
ValueError: num_samples should be a positive integer value, but got num_samples=of 0x000001932A20E820>>

部分代码如下：

    data_source: Sized

    def __init__(self, data_source: Sized) -> None:
        self.data_source = data_source

    def __iter__(self) -> Iterator[int]:
        return iter(range(len(self.data_source)))

    def __len__(self) -> int:
        return len(self.data_source)


class RandomSampler(Sampler[int]):
    data_source: Sized
    replacement: bool

    def __init__(self, data_source: Sized, replacement: bool = False,
                 num_samples: Optional[int] = None, generator=None) -> None:
        self.data_source = data_source
        self.replacement = replacement
        self._num_samples = num_samples
        self.generator = generator



        if not isinstance(self.replacement, bool):
            raise TypeError("replacement should be a boolean value, but got "
                            "replacement={}".format(self.replacement))

        if not isinstance(self.num_samples, int) or self.num_samples <= 0:
            raise ValueError("num_samples should be a positive integer "                              #此处报错
                             "value, but got num_samples={}".format(self.num_samples))

self.num_samples 必须是int类型 而且必须 大于0