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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 DbGetAttributeAliasList(self, argin):
 """ Get attribute alias list for a specified filter :param argin: attribute alias filter string (eg: att*) :type: tango.DevString :return: attribute aliases :rtype: tango.DevVarStringArray """

        self._log.debug("In DbGetAttributeAliasList()")
        if not argin:
            argin = "%"
        else:
            argin = replace_wildcard(argin)
        return self.db.get_attribute_alias_list(argin)