run.py 文件源码

def exit():
    """Exit subprocess, possibly after first clearing exit functions.

    If config-main.cfg/.def 'General' 'delete-exitfunc' is True, then any
    functions registered with atexit will be removed before exiting.
    (VPython support)

    """
    if no_exitfunc:
        import atexit
        atexit._clear()
    sys.exit(0)