What does python interpreter do when you use Process or Pool to achieve multiprocessing?

Question

What does python interpreter do when you use Process or Pool to achieve multiprocessing. Are all the codes and global variables created copied to the child process?

Answer 1

It depends on the Operating System and on the start method you choose.

You can find a description of start methods in the multiprocessing documentation.

Unix Operating Systems generally support all three methods whereas NT Operating Systems (Windows) only support the spawn method.