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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 init(self):
 """Init the connection to the Riemann server."""

        if not self.export_enable:
            return None
        try:
            client = bernhard.Client(host=self.host, port=self.port)
            return client
        except Exception as e:
            logger.critical("Connection to Riemann failed : %s " % e)
            return None