human
Complete this python program:
def dispatcher_connect(hass, signal, target):
assistant
#Here is the Python code you requested.

    """Connect a callable function to a signal.
    """
    async_unsub = run_callback_threadsafe(hass.loop, async_dispatcher_connect, hass, signal, target).result()
    def remove_dispatcher():
        'Remove    signal    listener.'
        run_callback_threadsafe(hass.loop, async_unsub).result()
    return remove_dispatcher