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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 setAuthLevel(self, level_uri, level, alias=None):
 """Set the value for the given auth level type. @param level: string representation of an authentication level valid for level_uri @param alias: An optional namespace alias for the given auth level URI. May be omitted if the alias is not significant. The library will use a reasonable default for widely-used auth level types. """

        self._addAuthLevelAlias(level_uri, alias)
        self.auth_levels[level_uri] = level