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Returns the triad graph with the given name.

Each string in the following tuple is a valid triad name:

('003', '012', '102', '021D', '021U', '021C', '111D', '111U',
 '030T', '030C', '201', '120D', '120U', '120C', '210', '300')

Each triad name corresponds to one of the possible valid digraph on three nodes.

Parameters:triad_name (string) – The name of a triad, as described above.
Returns:The digraph on three nodes with the given name. The nodes of the graph are the single-character strings ‘a’, ‘b’, and ‘c’.
Return type:DiGraph
Raises:ValueError – If triad_name is not the name of a triad.

See also