python启动多进程时，may have been in progress in another thread when fork() was called

python启动多进程时，may have been in progress in another thread when fork() was called。

解决方法：

pycharm中 -- 点击run -- Edit Configurations... -- 修改Environment varibles为OBJC_DISABLE_INITIALIZE_FORK_SAFETY=YES -- 保存

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参考 ： https://blog.csdn.net/weixin_30929195/article/details/96524364