Pytorch生成的DataLoader被iter或者enumerate调用后卡死的原因
Pytorch生成的DataLoader被iter或者enumerate调用后卡死的原因
pytorch 加载数据时报错：
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.
原因：多进程需要在main函数中运行，
解决方法1：
加main函数，在main中调用
解决方法2：
num_workers改为0，单进程加载
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