human
Complete the below
@callback
def async_dispatcher_connect(hass, signal, target):

    ''''Connect a callable function to a signal.
    This method must be run in the event loop.'
    '''
 ... Give me a the Python code you requested?
assistant
#Here is the Python code you requested.
    if (DATA_DISPATCHER not in hass.data):
        hass.data[DATA_DISPATCHER] = {}
    if (signal not in hass.data[DATA_DISPATCHER]):
        hass.data[DATA_DISPATCHER][signal] = []
    hass.data[DATA_DISPATCHER][signal].append(target)
    @callback
    def async_remove_dispatcher():
        'Remove    signal    listener.'
        try:
            hass.data[DATA_DISPATCHER][signal].remove(target)
        except (KeyError, ValueError):
            _LOGGER.warning('Unable    to    remove    unknown    dispatcher    %s', target)
    return async_remove_dispatcher