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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _pusher_connect_handler(self, data):
 """Event handler for the connection_established event. Binds the shortlink_scanned event """

        self.channel = self.pusher.subscribe(self.pos_callback_chan)
        for listener in self.pusher_connected_listeners:
            listener(data)