may have been in progress in another thread when fork() was called.

运行Python代码报错，之前好好的，今天很突然

may have been in progress in another thread when fork() was called.

解决方法：添加环境变量：

OBJC_DISABLE_INITIALIZE_FORK_SAFETY=YES

参考 “+[SomeClass initialize] may have been in progress in another thread when fork() was called”