threading.py 文件源码

def __init__(self):
        Thread.__init__(self, name=_newname("Dummy-%d"))

        # Thread.__block consumes an OS-level locking primitive, which
        # can never be used by a _DummyThread.  Since a _DummyThread
        # instance is immortal, that's bad, so release this resource.
        del self._Thread__block

        self._Thread__started.set()
        self._set_ident()
        with _active_limbo_lock:
            _active[_get_ident()] = self