Windows10 下运行 PyTorch 报错 RuntimeError: An attempt has been made to start a new process before the

问题描述

• Windows 10 下运行 PyTorch 程序，报错如下：

RuntimeError:
        An attempt has been made to start a new process before the
        current process has finished its bootstrapping phase.

        This probably means that you are not using fork to start your
        child processes and you have forgotten to use the proper idiom
        in the main module:

            if __name__ == '__main__':
                freeze_support()
                ...

        The "freeze_support()" line can be omitted if the program
        is not going to be frozen to produce an executable.

解决方法

• 将 PyTorch 代码中 torch.util.data.DataLoader() 中参数 num_workers 设置为更小的数字，如果不行就直接设置为 0