How to use the blinker.base function in blinker

def test_signal(self, livedata):
        signal = livedata.signal('/foo/bar')
        assert isinstance(signal, blinker.base.Signal)

def test_meta_connect_failure():
    def meta_received(sender, **kw):
        raise TypeError('boom')

    assert not blinker.receiver_connected.receivers
    blinker.receiver_connected.connect(meta_received)

    def receiver(sender, **kw):
        pass
    sig = blinker.Signal()

    assert_raises(TypeError, sig.connect, receiver)
    assert not sig.receivers
    assert not sig._by_receiver
    assert sig._by_sender == {blinker.base.ANY_ID: set()}

    blinker.receiver_connected._clear_state()

def _monkey_patch_hashable_func():
    def hashable_identity(obj):
        if hasattr(obj, '__func__'):
            return (id(obj.__func__), id(obj.__self__))
        elif hasattr(obj, 'im_func'):
            return (id(obj.im_func), id(obj.im_self))
        elif isinstance(obj, (str, bytes)):
            return obj
        # hack for session hash info
        elif hasattr(obj, "info") and obj.info:
            return hash(str(sorted(obj.info.items())))
        else:
            return id(obj)

    import blinker.base
    blinker.base.hashable_identity = hashable_identity
_monkey_patch_hashable_func()