Python's "multiprocessing" module feels like threads ... The only mylist variable in the main process remains empty, because no one ever appended to it. Queues are FIFOs (that is, "first in, first out ...

Python knows that I/O can take a long time ... and doing something such as an "append" from one thread might cause all sorts of problems. However, you can use a "queue" data structure, which is thread ...