def disconnect(self, token):
        '''
        Unregisters a callback for an event topic.

        @param token: Token of the callback to unregister
        @type token: dict
        '''
        topic = token['topic']
        try:
            arr = self._connects[topic]
        except __HOLE__:
            return
        arr.remove(token['cb'])
        if len(arr) == 0:
            del self._connects[topic]
dataset/ETHPy150Open parente/pyttsx/pyttsx/engine.py/Engine.disconnect