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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 MetatagDistinctValuesGet(self, metatag_name, namespace = None):

 """
 Find the distinct value of a metatag name in a certain namespace
 
 @param metatag_name (string) - Name of the metatag for which to find the distinct values
 @param namespace (stirng) - Namespace in which to find the distinct values
 
 @return (bool) - Boolean indicating whether MetatagDistinctValuesGet was successful
 """

        ns = "default" if namespace is None else namespace
        if self.__SenseApiCall__("/metatag_name/{0}/distinct_values.json", "GET", parameters = {'namespace': ns}):
            return True
        else:
            self.__error__ = "api call unsuccessful"
            return False