【OSS】在Mac环境中Python多线程运行报错，是什么原因？

在Mac环境中用Python启动多线程并在子线程中使用OSS时，import tensorflow会报错，没有import tensorflow则不会报错。如果没有启动多线程，使用OSS时import tensorflow不会报错。

objc[2483]: +[__NSPlaceholderDate initialize] may have been in progress in another thread when fork() was called.
objc[2483]: +[__NSPlaceholderDate initialize] may have been in progress in another thread when fork() was called. We cannot safely call it or ignore it in the fork() child process. Crashing instead. Set a breakpoint on objc_initializeAfterForkError to debug.