Execute in a multiprocessing child dynamic code loaded by the parent process

[Dieter Maurer]

Martin Di Paola wrote at 2022-3-6 20:42 +0000:
>>Try to use `fork` as "start method" (instead of "spawn").
>
>Yes but no. Indeed with `fork` there is no need to pickle anything. In
>particular the child process will be a copy of the parent so it will
>have all the modules loaded, including the dynamic ones. Perfect.
>
>The problem is that `fork` is the default only in Linux. It works in
>MacOS but it may lead to crashes if the parent process is multithreaded
>(and the my is!) and `fork` does not work in Windows.

Then, you must put the initialization (dynamically loading the modules)
into the function executed in the foreign process.

You could wrap the payload function into a class instances to achieve this.
In the foreign process, you call the instance which first performs
the initialization and then executes the payload.