def tetrahedral_graph(create_using=None):
 G = complete_graph(4, create_using)
 G.name = 'Platonic Tetrahedral graph'
 return G

def tetrahedral_graph ( create_using = None ) : G = complete_graph ( 4 , create_using ) G . name = 'Platonic Tetrahedral graph' return G
return the 3-regular platonic tetrahedral graph .