What does sys.exit really do with multiple threads?

Question

I was really confused by sys.exit() in python. In python documentation, it says \"Exit from Python\"; does that mean when sys.exit() is called in a python progr

Answer 1

As per the documentation sys.exit() raises SystemExit:

Exit the interpreter by raising SystemExit(status).

If SystemExit reaches the default exception handler, it calls handle_system_exit(), which more or less pushes through to Py_Finalize(), which in turn calls wait_for_thread_shutdown() in Python 2, so sys.exit() is the same as the normal falling off the bottom of the main module in waiting for all non-daemon threads to terminate.