gistfile1.py

    def test_subthread_delete():
        app = wx.GetApp()
        t, t2 = wx.Timer(), wx.Timer()
        t.t = t2
        t2.t = t
        timers = [t, t2]
        del t, t2
        from threading import Thread

        def subthread():
            del timers[:]
            gc.collect()
            assert 2 == len(app.pendingDelete)

        t = Thread(target=subthread)
        t.start()
        wx.flush_pending_delete()
        assert 0 == len(app.pendingDelete)