Ruby and Python's standard implementations make use of a Global Interpreter Lock. Justin James explains the major advantages and downsides of the GIL mechanism.

A Python program that uses threading is typically a good candidate for using async. Threads in Python are cooperative; they yield to one another as needed. Async tasks in Python work the same way.

I have worker thread(s) that use the logger. In the main thread, I occasionally need to ask the user to take some action. Which means I need to suppress the logger from actually printing until the ...