PYTHONOPTIMIZE在python解释器中做什么？

Question

我用supervisor运行python任务，当我尝试在python任务中使用multilprocess时，遇到了错误

"File/usr/local/Cellar/python/2.7.6/Frameworks/Python.framework/Versions/2.7/lib/python2.7/multiprocessing/process.py", line 124, in start 

'daemonic processes are not allowed to have children'" 

但是在终端执行命令"export PYTHONOPTIMIZE=1"之后就可以了，任何人都可以告诉我在执行命令"export PYTHONOPTIMIZE=1"时发生了什么

Answer 1

将^{} environment variable设置为1与使用^{} command line switch相同：

Remove assert statements and any code conditional on the value of __debug__.

您看到的错误消息是AssertionError异常；relevant section of the source code使用assert：

assert not _current_process._daemonic, \
       'daemonic processes are not allowed to have children'

因此，设置环境变量只会抑制断言。问题本身并没有消失。你知道吗