The "freeze_support()" line can be omitted if the program is not...

小渣渣

PyTorch错误：The “freeze_support()” line can be omitted if the program is not going to be frozen to produce an executable.

错误代码如下：

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.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.

解决方案

将你要运行的代码块放到main函数中运行即可，例如：

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区别

不加 if __name__ == '__main__':：模块中的代码（包括函数调用）在导入时也会被执行。
加 if __name__ == '__main__':：模块中的代码（包括函数调用）只有在模块作为主程序运行时才会执行，而在导入时不执行。

这种模式有助于提高代码的可重用性和模块化，避免在导入模块时意外执行某些代码。