def __init__ ( self, map ):
        self.map  = map
        self._map = _map = {}
        for key in map.keys():
            _map[ key ] = key
        self.fast_validate = ( 10, _map, self.validate )
Add a single node to the Graph.
dataset/ETHPy150Open enthought/traits/traits/trait_handlers.py/TraitPrefixMap.__init__--crossover with--dataset/ETHPy150Open pgmpy/pgmpy/pgmpy/base/UndirectedGraph.py/UndirectedGraph.add_node