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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 DbGetClassList(self, argin):
 """ Get Tango class list with a specified filter :param argin: Filter :type: tango.DevString :return: Class list :rtype: tango.DevVarStringArray """

        self._log.debug("In DbGetClassList()")
        server = replace_wildcard(argin)
        return self.db.get_class_list(server)