pycharm报错：RuntimeError: DataLoader worker (pid(s) 15316, 3652, 22168, 24852) exited unexpectedly

解决方法有两个：

方案1：定位到d2l文件夹下的torch.py文件，找到 get_dataloader_workers() 函数：

# Defined in file: ./chapter_linear-networks/image-classification-dataset.md
def get_dataloader_workers():
    """Use 4 processes to read the data."""
    return 4

　　将上述函数修改为：

# Defined in file: ./chapter_linear-networks/image-classification-dataset.md
def get_dataloader_workers():
    """Use 0 processes to read the data."""
    return 0

方案2：在项目中加入 if __name__ == "__main__": 语句，如下为本人的调用方法：

if __name__ == "__main__":
    print(evaluate_accuracy(net, test_iter))

参考文章：https://blog.csdn.net/m0_55868614/article/details/123651223