How to let the child process live when parent process exited?

Question

I want to use multiprocessing module to complete this.

when I do this, like:

    $ python my_process.py

I start a pare

Answer 1

Here's one way to achieve an independent child process that does not exit when __main__ exits. It uses the os._exit() tip mentioned above by @WKPlus.

Is there a way to detach matplotlib plots so that the computation can continue?

Answer 2

A trick: call os._exit to make parent process exit, in this way daemonic child processes will not be killed.

But there are some other side affects, described in the doc:

Exit the process with status n, without calling cleanup handlers, 
flushing stdio buffers, etc.

If you do not care about this, you can use it.