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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 disconnect(self):
 """ Disconnect from IB connection. """

        self.connState = Client.DISCONNECTED
        if self.conn is not None:
            self._logger.info('Disconnecting')
            self.conn.disconnect()
            self.wrapper.connectionClosed()
            self.reset()