
这是一个关于windows上多进程实现的恩特。在windows上,子进程会自动import启动它的这个文件,而在import的时候是会自动执行这些语句的。如果不加__main__限制的化,就会无限递归创建子进程,进而报错。于是import的时候使用 name == “main” 保护起来就可以了
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