launch processes from threads

[Skaperen]

i am refactoring a program that dynamically runs many processes at the same time. these processes are other programs (often to download, upload, compress, or uncompress something). a 2nd process runs for each "task" to start those process and wait for them to finish (or restart them if soft errors happen). this means each task is running 2 processes. i am hitting process limits too early. so i am thinking about threads to run the control logic for each task. but this would mean launching processes from threads which i recall reading that is not supported. can someone tell me of the current status of and if a newer version of Python3 can now do this. if not, i am thinking to have an extra process that does all the process work (launching, waiting) based on requests via pipes and sending responses back via a pipe. maybe there would be a pipe per task or the task ID is sent with each message over the pipe. ideas? FYI, i have done similar in C w/o threads.