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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 sendBox(self, box):
 """ Add the route and send the box. """

        if self.remoteRouteName is _unspecified:
            raise RouteNotConnected()
        if self.remoteRouteName is not None:
            box[_ROUTE] = self.remoteRouteName.encode('ascii')
        self.router._sender.sendBox(box)